Answers
So,
We could use the formula of an ideal gas:
\(PV=nRT\)Where P is the pressure of the gas in atm, V is the volume in L, R is a constant, n represents the number of moles of the gas, and T is the temperature in K.
Given that we know that:
\(\begin{gathered} P=30.0psi \\ mass=1.39gCO_2 \\ V=352ml \end{gathered}\)We should convert some units first to use the equation.
The pressure units have to be expressed in atm!
1psi = 0.068atm, so:
\(30.0psi\cdot\frac{0.068atm}{1psi}=2.04atm\)The volume units have to be expressed in Liters!
1L = 1000ml, so:
\(352ml\cdot\frac{1L}{1000ml}=0.352L\)Now, remember that we need to find the number of moles of the gas (n). We could use the fact that the number of moles of a compound is equal to:
\(n=\frac{\text{Given mass}}{molecular\text{ mass}}\)In this case, our given mass is 1.39g CO2.
The molecular mass of a compound can be found if we multiply the number of atoms of each element by their molar mass, and then sum all these results. This is,
Therefore, the number of moles contained in 1.39g of CO2 are:
\(n=\frac{1.39gCO_2}{\frac{44gCO_2}{\text{mol}}}=0.03159molesCO_2\)Now that we have P = 2.04, V = 0.352, n = 0.03159 and R = 0.082, we could replace all these values in the equation given. Remember that R is a given value which is 0.082.
\(\begin{gathered} PV=nRT \\ (2.04atm)(0.352L)=(0.03159molCO_2)(\frac{0.082atm\cdot L}{molCO_2\cdot K})(T) \end{gathered}\)To find T, we solve the last equation for T:
\(\begin{gathered} \frac{(2.04atm)(0.352L)}{(0.03159molCO_2)(\frac{0.082atm\cdot L}{molCO_2\cdot K})}=T \\ \\ 277.210K=T \end{gathered}\)Therefore, the temperature inside the can was 277.210°K.
We need this result in °C, so we substract 273.15:
\(\begin{gathered} T=277.210K-273.15K \\ T=4.06C \end{gathered}\)Finally, the temperature of the pop was 4.06°C. So, it was cold.
Related Questions
ORDS ONLY. 71.A broad, painless, pink-gray, wart like infectious lesions may develop on the vulva, perineum, or anus in syphilis is called----- 72. In suspected syphilis infection the term RPR stands for? 73. The recommended dosage of Benzathine Penicillin in an adult in Zambia is je 74. The recommended drug for treatment of gonorrhea when using syndromic management is 75. The causative organism for chancroid is called- 76. The commonest type of HIV is 77.The assertive, problem solving approach to identification and treatment of the patient's problems is called --- 78. A tumour arising from the cells producing melanin is also known as 1 79. The type of sound described as drum like, loud, empty quality felt over gas-filled stomach, intestine or pneumothorax which is heard during percussion is called host wall into the pleural space to obtain
Answers
71. The broad, painless, pink-gray, wart-like infectious lesions that may develop on the vulva, perineum, or anus in syphilis are called "condyloma lata."
72. In suspected syphilis infection, the term RPR stands for "Rapid Plasma Reagin." It is a blood test used to screen for syphilis.
73. The recommended dosage of Benzathine Penicillin in an adult in Zambia may vary depending on the stage and severity of the syphilis infection. It is best to consult local guidelines or a healthcare professional for the specific recommended dosage in Zambia.
74. The recommended drug for the treatment of gonorrhea when using syndromic management may vary depending on local guidelines and antibiotic resistance patterns. Commonly used antibiotics include ceftriaxone in combination with azithromycin or doxycycline.
75. The causative organism for chancroid is called "Haemophilus ducreyi."
76. The commonest type of HIV is "HIV-1."
77. The assertive, problem-solving approach to the identification and treatment of the patient's problems is called "clinical decision-making."
78. A tumor arising from the cells producing melanin is also known as "melanoma."
79. The type of sound described as drum-like, loud, and empty quality felt over a gas-filled stomach, intestine, or pneumothorax during percussion is called "tympany."
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what is the PH scale of 0.02m of hydrochloric acid
Answers
Answer:
Explanation:
The pH of 0.02 M hydrochloric acid is approximately 1.7.
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To determine the pH of a hydrochloric acid solution, we need to know its concentration. You mentioned a concentration of 0.02 M (molar), which refers to 0.02 moles of hydrochloric acid dissolved in 1 liter of solution.
Hydrochloric acid (HCl) is a strong acid that dissociates completely in water, meaning all HCl molecules release their hydrogen ions (H+) into the solution. Since the concentration is given as 0.02 M, it means there are 0.02 moles of H+ ions in 1 liter of the solution.
To calculate the pH, we can use the formula:
pH = -log[H+]
In this case, [H+] represents the concentration of hydrogen ions in moles per liter. Since hydrochloric acid is a strong acid and it dissociates completely, the concentration of hydrogen ions is equal to the concentration of HCl, which is 0.02 M.
pH = -log(0.02) ≈ 1.70
Therefore, a hydrochloric acid solution with a concentration of 0.02 M would have a pH of approximately 1.70, indicating it is strongly acidic.
What is the mass of an iron piece that cools from 57.8 °C to 26.4°C while releasing
7160.2 J of heat? The specific heat capacity of iron is 0.444 J/gºC.
Answers
show the equations you will use to calculate %protein, %phosphate, and %fat in milk
Answers
%Protein = (Protein content in Milk / Total Weight of Milk) x 100
%Phosphate = (Phosphate content in Milk / Total Weight of Milk) x 100
%Fat = (Fat content in Milk / Total Weight of Milk) x 100
Define weight?
Weight is a measure of the force of gravity on an object. It is the amount of mass an object has and is usually measured in kilograms (kg) or pounds (lbs). Weight is related to mass, but not the same; mass is the amount of matter in an object, while weight is a measure of the strength of gravity on that object. Weight is a vector quantity, which means it has both magnitude and direction. Weight is an important factor to consider when designing objects and structures, as it affects how much a material can support and the amount of stress it can withstand.
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In the following reaction how many moles of NaCI are needed to produce 5.4 miles of Na2O
NaCI+MgO= Na2O+MgCI2
Answers
To produce 5.4 moles of \(Na_{2} O\) in the given reaction, 10.8 moles of NaCl are required.
The given chemical equation is a balanced equation, which means it represents the stoichiometric relationship between the reactants and products involved in the reaction.
The coefficients of the balanced equation represent the number of moles of each reactant and product involved in the reaction.
In this case, the equation is:
2 NaCl + MgO → \(Na_{2} O\) + \(MgCl_{2}\)
From the equation, we can see that 2 moles of NaCl are required to produce 1 mole of . Therefore, to produce 5.4 moles of \(Na_{2} O\), we need to use stoichiometry to determine the amount of NaCl required.
We can use the following formula to calculate the number of moles of NaCl required:
moles of NaCl = moles of \(Na_{2} O\) × (2 moles NaCl / 1 mole \(Na_{2} O\))
Substituting the given values, we get:
moles of NaCl = 5.4 moles \(Na_{2} O\) × (2 moles NaCl / 1 mole \(Na_{2} O\)) = 10.8 moles NaCl
Therefore, we need 10.8 moles of NaCl to produce 5.4 moles of \(Na_{2} O\) in the given reaction.
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The North American Free Trade Agreement (NAFTA) provides for free trade
between Canada, the United States, and Mexico. How has the agreement
most influenced the agricultural sector of the United States economy?
O A. It has put U.S. farmers out of business because of excessive
regulation
B. It has increased the sales of U.S. farm products to Mexico and
Canada
O C. It has caused U.S. farmers to relocate operations to Mexico to
avoid tariffs
O D. It has created political pressure for government subsidies to U.S.
farmers
Answers
NAFTA provides enormous benefits to the United States, Canada, and Mexico by facilitating cross-border trade, job creation, and economic growth. However, it has also created political pressure for government subsidies to the United States, where businesses and industries are struggling to compete with low-cost Mexican producers.
The North American Free Trade Agreement (NAFTA) provides for free trade between the United States, Canada, and Mexico, which is a landmark trade agreement in North America. NAFTA has expanded cross-border trade by lowering tariffs and trade barriers among the three countries, making it easier for goods and services to move across the borders.NAFTA provides enormous benefits, including increased trade, job creation, lower costs for goods, and services.
It has led to an increase in foreign investment, cross-border trade, and job creation. NAFTA's liberalization has contributed to increased cross-border integration, including trade in goods and services, and financial integration among the three countries, which has resulted in a more prosperous North American economy.However, NAFTA has created political pressure for government subsidies to the United States, where businesses and industries are struggling to compete with low-cost Mexican producers.
As a result, many industries and labor groups in the United States have called for the imposition of import barriers and other forms of protectionism to protect their interests. They have also criticized the agreement for its impact on domestic industries and jobs.The government subsidies have led to the loss of jobs in many domestic industries, such as the automotive and steel industries. The NAFTA's provisions have created competition between the two countries, which has driven down prices and led to a reduction in the number of jobs in certain sectors of the economy.
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Determine the number of significant figures in each of the following measurements: (a) 4867 mi (b) 2901 g (c) 0.0000003 cm (d) 4.6 × 10^19 atoms
Answers
Answer:
a) 4 sig. figs.
b) 4 sig. figs.
c) 1 sig. fig.
d) 2 sig. figs.
Explanation:
First, let's remember some rules of significant figures:
1. All nonzero digits in a measurement are significant.
2. Zeros that appear between other nonzero digits are always significant.
3. Zeros that appear in front of all of the nonzero digits are called left-end zeros. Left-end zeros are never significant.
4. Zeros that appear after all nonzero digits are called right-end zeros. Right-end zeros in a number that lacks a decimal point are not significant.
5. Right-end zeros in a number with a decimal point are significant. This is true whether the zeros occur before or after the decimal point.
Now, let's answer for each measurement:
a) 4867 mi: based on rule (1), we have 4 significant figures.
b) 2901 g: based on rule (2), we have 4 significant figures.
c) 0.0000003 cm: based on rule (3), we have 1 significant figure.
d) 4.6 x 10^19 atoms: in a scientific notation, we just take into account the number that precedes the 10 with its exponent, which in this case is 4.6, so based on rule (1), we have 2 significant figures.
What happens when samples of matter interact?
Answers
Answer: matter and its interaction with energy. Matter has mass and occupies space. A Substance is matter that cannot be separated into other kinds of matter by physical means.
Explanation:
In a coffee-cup calorimeter, 130.0 mL of 1.3 M NaOH and 130.0 mL of 1.3 M HCl are mixed. Both solutions were originally at 21.8°C. After the reaction, the final temperature is 30.5°C. Assuming that all the solutions have a density of 1.0 g/cm^3 and a specific heat capacity of 4.18 J/°C · g, calculate the enthalpy change for the neutralization of HCl by NaOH. Assume that no heat is lost to the surroundings or to the calorimeter.
H = ? kJ/mol
Answers
The heat capacity of a substance or system is defined as the amount of heat required to raise the temperature through 1°C. It is an extensive property and its value depends on the quantity of matter present.
The heat needed to raise the temperature of 1 gram of the substance through 1°C is the specific heat capacity.
Heat required is:
q = mc (T₂ - T₁)
m = V × ρ
q = (130 + 130) × 1.0 × 4.18 ( 30.5 - 21.8) = 9455.16 J
9455.16 J = 9.45516 kJ
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What is the pH of a 0.08 M solution of Ca(OH),?
Answers
Answer:
pH = 12.20
Explanation:
Ca(OH)2 is a strong base, so it dissociates completely. A 0.08 M solution of Ca(OH)2 is 0.16 M OH-, since every mole of Ca(OH)2 has 2 OH-.
Calculate pOH using [OH-] = 0.16 M
pOH = -log(0.16) = 0.80
pH = 14 - pOH = 14 - 0.80 = 12.20
Taking into account the definition of pH and pOH, the pH of a 0.08 M solution of Ca(OH)₂ is 13.21
pHFirst of all, pH is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.
The pH is defined as the negative base 10 logarithm of the activity of hydrogen ions, that is, the concentration of hydrogen ions or H₃O⁺:
pH= - log [H⁺]= - log [H₃O⁺]
pOHSimilarly, pOH is a measure of hydroxyl ions in a solution and is expressed as the logarithm of the concentration of OH⁻ ions, with the sign changed:
pOH= - log [OH⁻]
Relationship between pH and pOHThe following relationship can be established between pH and pOH:
pOH + pH= 14
This caseA strong base is one that dissociates completely in water, that is, it contributes the maximum number of OH- ions.
Ca(OH)₂ is a strong base that for each Ca²⁺ cation there are two OH⁻ anions and in which for each mole of Ca(OH)₂ two moles of OH⁻ are formed.
So: [OH⁻]= 2×[Ca(OH)₂]
[OH⁻]= 2×0.08 M
[OH⁻]= 0.16 M
Replacing in the definition of pOH:
pOH= - log (0.16 M)
Solving:
pOH= 0.79
Finally, considering the relationship between pH and pOH:
0.79 + pH= 14
pH= 14 - 0.79
pH= 13.21
In summary, the pH of a 0.08 M solution of Ca(OH)₂ is 13.21
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How does a change in the temperature of the boiling point indicate that a chemical reaction has occurred?
Answers
Answer:
A change in temperature is characteristic of a chemical change. ... If temperature increases, as it does in most reactions, a chemical change is likely to be occurring. This is different from the physical temperature change. During a physical temperature change, one substance, such as water is being heated.
Answer:
If a reaction is a chemical reaction, then a change of temperature can be noticed, it can either be endothermic (a decrease in temp.) or it can be exothermic (increase in temp.). Any kind of change in temperature of a substance is considered as a characteristic of a chemical reaction.
2. Name the type of reaction.
1 Fe₂O3 + C→ Fe + CO
2S + Cl₂ → SCI
3C₂H₂ + O₂ CO₂ + H₂O
4NaF→→ Na + F₂
5CaO + MgS →→ CaS + M
Answers
Answer:
1.) Single Displacement Reaction
2.) Synthesis Reaction
3.) Single Displacement Reaction
4.) Decomposition Reaction
5.) Double Displacement Reaction
Explanation:
Single Displacement Reaction: a reaction in which an element is swapped out for another in a molecule
Double Displacement Reaction: a reaction in which the cation of one molecule is swapped out with the cation of another
Decomposition Reaction: a reaction in which a molecule breaks down into smaller molecules/atoms
Synthesis Reaction: a reaction in which atoms or molecules come together to create a larger molecule
does alkene/alkyne has isomers?
Answers
depend on which of them , they can have for example we have 1-buten ,2buten , iso buten(structural isomers) also they can have sterio isomers too
how many grams of oxygen can be prepared by the decomposition of 12 grams of mercury oxide
Answers
Taking into account the reaction stoichiometry, 0.886 grams of O₂ can be prepared by the decomposition of 12 grams of mercury oxide.
Reaction stoichiometryIn first place, the balanced reaction of the decomposition of mercury oxide is:
2 HgO → 2 Hg + O₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
HgO: 2 moles Hg: 2 moles O₂: 1 moleThe molar mass of the compounds is:
HgO: 216.59 g/moleHg: 200.59 g/moleO₂: 32 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
HgO: 2 moles ×216.59 g/mole= 433.18 grams
Hg: 2 moles ×200.59 g/mole= 401.18 grams
O₂: 1 mole ×32 g/mole= 32 grams
Mass of oxygen formedThe following rule of three can be applied: if by reaction stoichiometry 433.18 grams of HgO form 32 grams of O₂, 12 grams of HgO form how much mass of O₂?
\(mass of O_{2} =\frac{12 grams of HgOx 32 grams of O_{2}}{433.18 grams of HgO}\)
mass of O₂= 0.886 grams
Then, 0.886 grams of O₂ can be prepared by the decomposition of 12 grams of mercury oxide.
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Human blood contains a buffer of carbonic acid (H_2 CO_3) and bicarbonate anion (HC〖O_3〗^-) in order to maintain blood pH between 7.35 and 7.45, as a value higher than 7.8 or lower than 6.8 can lead to death. In this buffer, hydronium and bicarbonate anion are in equilibrium with carbonic acid. Furthermore, the carbonic acid in the first equilibrium can decompose into CO_2 gas and water, resulting in a second equilibrium system between carbonic acid and water. Because CO_2 is an important component of the blood buffer, its regulation in the body, as well as that of O_2 , is extremely important. The effect of this can be important when the human body is subjected to strenuous condition.
Carbonic acid buffer:
H_2 CO_3 (aq)+ H_2 O(l) ↔H_3 O^+ (aq)+HC〖O_3〗^- (aq)
1. Write the equilibrium constant expression K_c for the carbonic acid buffer in the blood.
Answers
Kc = [H3O+][HCO3-] / [H2CO3]
Remember that Kc is products over reactants. Also, you do not include liquid water in a Kc expression, since liquid water has no concentration.
classify each solid as a covalent, ionic, metallic, or molecular solid. drag the appropriate items to their respective bins. view available hint(s)for part a resethelp covalentdroppable ionicdroppable metallicdroppable moleculardroppable
Answers
The appropriate items to their respective bins are:
Covalent: Carbon dioxide
Ionic: Table salt
Metallic: Iron
Molecular: Sugar
What is bins?
Bins are containers used for storing and organizing items. They can be made from a variety of materials, including wood, metal, and plastic, and come in many shapes and sizes. Bins are often used in large warehouses, retail stores, and other business establishments to store and organize products, tools, and other items. In the home, bins can be used to store toys, shoes, and other items that need to be kept organized.
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Slate one use of ethanol based on its volatile nature
Answers
We can see here that one use of ethanol based on its volatile nature is as a fuel additive.
What is ethanol?Ethanol, also known as ethyl alcohol or grain alcohol, is a volatile, colorless liquid that belongs to the alcohol chemical group. It is produced through the fermentation of sugars by yeast or other microorganisms. Ethanol has a wide range of applications, including industrial, fuel, and recreational uses.
Ethanol is a renewable resource that can be used to replace gasoline in some applications. It is also less polluting than gasoline, and it can help to reduce greenhouse gas emissions.
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Select all of the abiotic factors in an ecosystem.
Plants
Sunlight
Soil
Animals
Rocks
Dead deer in the forest
Temperature
Answers
Answer:
Sunlight, Soil, Rocks, Temperature and dead deer
You could say the dead tree is now an abiotic factor because biotic factors refer to living things.
What is the proper way of collection, preservation and transition of hair?
Answers
what kind of air do winds coming from land masses bring?
moist air
low pressure air
dry air
high pressure air
Answers
Identify the element by its symbol and name after looking at the element model pictured below.
Symbol:
Name:
Answers
Symbol: O
Name: Oxygen
as number of protons + number of neutrons = atomic mass
8+8=16
The element is Oxygen (O) in the given element model.
The atomic number of an element is equal to the number of protons in its nucleus. Since the element in question has 8 protons, its atomic number is 8. Oxygen has an atomic number of 8, making it the element with 8 protons. Additionally, the atomic number determines the identity of an element; no other element has 8 protons in its nucleus.
The element's name is Oxygen, and its chemical symbol is O. Oxygen is a vital element in the Earth's atmosphere and is essential for supporting life. It is commonly found in the form of diatomic molecules (O2), which make up a significant portion of the air we breathe. Oxygen plays a crucial role in various biochemical and chemical processes, and its presence is essential for the respiration of most living organisms.
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When neurotransmitter is released into the synaptic cleft, it is taken up by the post-synaptic neuron.
Answers
Answer:
Plz make me brainliest
Explanation:
The neurotransmitters released into the cleft diffuse through it to reach the post-synaptic neuron. Neurotransmitters remain in cleft for only some time. They are either taken up by the presynaptic neuron or are broken down by the enzymes present in the synaptic cleft. The post-synaptic neuron contains several receptors on its plasma membrane
The temperature of the two frames is reported to be either 80°C or 135°C. What is the temperature of the right (products) based upon the observations?
°C
Answers
Based on the observations, the temperature of the right (products) is less than the temperature of the left (reactants).
What is the relationship between temperature and the physical state of a substance?The relationship between temperature and the physical state of a substance is that an increase in the temperature of a substance results in more randomness of the particles of the substance while a decrease in temperature will result in more orderliness of the particles of a substance.
The energy that is given during a change in the state of matter is used to alter the binding energies rather than boost the kinetic energy of the molecules. As a result, the temperature doesn't change.
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Consider the chemical formulas or descriptions below. Match to the appropriate form of matter.
Fe - iron metal
a. Compound
✓ NaCl
b. Element
H2O + NaCl (salt water)
C. Homogeneous Mixture
d. Heterogeneous Mixture
Iced tea with lemons.
VP4
C6H1206
Answers
Answer:
Fe iron metal element
H2O + NaCl is a homogeneous mixture
Iced tea with lemon is heterogeneous mixture
VP4 is compound
And C6H12O6 glucose is also a compound
Explanation:
Calculate the mass percent by volume of 34.1 g of glucose
(C.H120., MM = 180.2 g/mol) in
325 mL of solution.
Answers
Answer:
10.5%
Explanation:
The equation used to calculate mass percent by volume is:
Mass Solute (g)
Mass/Volume % = ----------------------------------- x 100%
Volume Solution (mL)
In this case, the solute is the glucose. You can plug the given values into the equation and solve.
34.1 g C₆H₁₂O₆
Mass/Volume % = ------------------------------- x 100%
325 mL soln
Mass/Volume % = 0.105 x 100%
Mass/Volume % = 10.5%
What's similar about the valence electrons of Carbon and Silicon?
Answers
Answer:
Explanation: Carbon and silicon BOTH come from Group 14 of the Periodic Table , i.e. both formally have the same number of valence electrons, 4 such electrons.........
what are some characteristics of the structure of DNA
Answers
Answer:
Explanation:
DNA is composed of two side-by-side chains (“strands”) of nucleotides twisted into the shape of a double helix. ...
The bases are attached to the 1′ carbon of each deoxyribose sugar in the backbone of each strand. ...
The association of A with T and G with C is through hydrogen bonds
Which structure is consistent with this 'H NMR spectrum? (wdd) a. Hg CH;CH; CHACH; H (b) 8 CH;O COCH-CH; (C) CH;CHz CH;CHz (D) CCH; CH;CHz
Answers
The structure is consistent with this 'H NMR spectrum is CH;OCCH;. Option a is correct answer.
The 'H NMR spectrum doesn't provide enough information to definitively determine the structure of the molecule. However, based solely on given options, the structure that is most consistent with the chemical shift of the proton signal at around 3.7 ppm is option A, CH3OC(=O)CH2CH3.
This is because the chemical shift of the proton on the OCH3 group is typically found in this region, and the presence of the carbonyl group would also affect the chemical shift of nearby protons. However, additional spectroscopic data and/or chemical tests may be necessary to confirm the structure.
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--The complete question is, Which structure is consistent with this 'H NMR spectrum? CH;OCCH; (B) COCH;CH; (C) OCCH,CH; (D) OCCH; CH;--
Match each vocabulary word with the correct definition.
1. protein produced by the body to combat foreign materials
2. substance that stimulates the production of an antibody
3. white blood cell
4. cells eating other cells or substances
5. excessive loss of water
antigen
antibody
phagocytosis
leukocyte
dehydration
Answers
2. antigen
3. leukocyte
4. phagocytosis
5. dehydration
Answer:
1. antibody
2. antigen
3. leukocyte
4. phagocytosis
5. dehydration
Explanation:
The following questions refer to the equilibrium shown here:
4NH3(g) + 5O2(g) <-> 4NO(g) + 6H2O(g)
For a certain reaction at 25.0°C, the value of K is 1.2 × 10–3. At 50.0°C the value of K is 3.4 × 10–1. This means that the reaction is:
a. Never favorable
b. More information needed
c. Endothermic
d. Exothermic
e. None of the above
Answers
The value of K changes, affected by temperature
Endothermic (ΔH = +): temperature rises ⇒ K increases
Exothermic (ΔH = -): temperature increases ⇒ K decreases
From the data in the problem, the value of K increases in proportion to the temperature, then the reaction is said to be endothermic (C)