One pound-mass of water fills a container whose volume is 2 ft^3 The pressure in the container is 100 psia.
Calculate the total internal energy and enthalpy in the container.
Answers
The total internal energy in the container is approximately 38,738,520 Btu, and the total enthalpy is approximately 38,831,104.2 Btu.
To calculate the total internal energy and enthalpy in the container, we need to use the specific volume of water and the specific internal energy and enthalpy values at the given pressure.
First, we convert the volume from cubic feet (ft³) to cubic inches (in³) since the specific volume of water is typically given in terms of in³/lbm.
1 ft³ = 12³ in³ = 1728 in³
So, the volume of water in the container is \(\begin{equation}2\text{ ft}^3 \times \frac{1728\text{ in}^3}{\text{ft}^3} = 3456\text{ in}^3\).
Next, we need the specific volume of water. At the given pressure of 100 psia, the specific volume of water is approximately 0.01604 in³/lbm.
Now we can calculate the total internal energy and enthalpy using the formulas:
Internal Energy = Mass * Specific Internal Energy
Enthalpy = Mass * Specific Enthalpy
The mass of water can be calculated using the specific volume:
\(\begin{equation}Mass = \frac{Volume}{Specific Volume} = \frac{3456\text{ in}^3}{0.01604\text{ in}^3/\text{lbm}} = 215214\text{ lbm}\)
Using the specific internal energy and enthalpy values at the given pressure, let's assume the values are approximately 180 Btu/lbm and 180.3 Btu/lbm, respectively.
Internal Energy = 215214 lbm * 180 Btu/lbm = 38,738,520 Btu
Enthalpy = 215214 lbm * 180.3 Btu/lbm = 38,831,104.2 Btu
Therefore, the total internal energy in the container is approximately 38,738,520 Btu, and the total enthalpy is approximately 38,831,104.2 Btu.
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Related Questions
During the SI Scavenger Hunt Lab, a student measured her foot length using a meter stick and recorded it as 25 cm. However, at the shoe store, the sales staff measured the length of her foot to be 23.7 cm. If the shoe store’s measurement is accepted as correct, what is the percent error of her meter stick measurement?
Answers
Answer:
Percent error in meter stick measurement is 5.5%.
Explanation:
Given data:
Measured value = 25 cm
Accepted value = 23.7 cm
percent error = ?
Solution:
Subtract the accepted value from measured value divided by accepted value multiply by 100.
Formula:
(measured value - accepted value / accepted value ) × 100
Now we will put the values.
(25 cm - 23.7 cm/23.7 cm ) × 100
1.3 cm/23.7 cm ) × 100
0.055× 100
5.5%
Percent error in meter stick measurement is 5.5%.
A student runs the following reaction in the lab: 2 Al + 3 CuBr2 --> 2 AIB3 + 3 Cu
If the student combines three moles each of Al and CuB2, what is the limiting reactant?
A. AlBr3
B. Al
C. CuBr2
D. Cu
Answers
B. Al. Al(Aluminium) is the limiting reactant because it is used up first in the reaction.
Aluminium is a silvery-white, lightweight metal that is the third most abundant element in the Earth’s crust. It is a strong and durable metal that has a wide range of applications, from construction and transportation to packaging and electronics. Aluminium is also non-toxic, non-magnetic and non-sparking, making it an ideal material for a variety of uses. Aluminium is also corrosion-resistant, which makes it ideal for outdoor applications.From the reaction \(2 Al + 3 CuBr_2\rightarrow 2 AIBr_3 + 3 Cu\). Since three moles of Al are combined with three moles of \(CuBr_2\), there are more \(CuBr_2\) molecules than Al molecules available for the reaction. This means that once all of the Al has been used up, there will still be some \(CuBr_2\) left over. Therefore, Al is the limiting reactant.
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Does knowing the ratio of masses of the elements in a compound lead to the unique chemical identity of the compound?
Answers
Isomers are compounds that have the same molecular formula but different arranged differently of the atoms.
For example
So even if they have the same proportion of their atoms, the chemical identity is different
The answer is option B: no because more than one compound can have the same ratio of masses of elements if the atoms are arranged differently.
can u answer all of em
Answers
Answer:
one is across
Explanation:
In the table on the next page,check off the clues that relate to the organisms that were found in the area. Using the clues,see if you can determine the order in which the organisms visited the campsite.
Answers
The order in which the organisms visited the campsite is most likely:
DeerRabbitBearBeaverHow to explain the orderThis is because the deer tracks are the most numerous, followed by the rabbit tracks. The bear tracks are less numerous than the rabbit tracks, but they are accompanied by fur. The beaver dam and lodge are the newest features of the campsite, and they are not associated with any other animal tracks.
It is possible that the bear and the beaver visited the campsite at the same time, but the beaver's activities are more recent. This is because the beaver dam and lodge are still in use, while the bear tracks are older and have been partially obscured by the deer tracks.
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In the table on the next page,check off the clues that relate to the organisms that were found in the area. Using the clues,see if you can determine the order in which the organisms visited the campsite.
here is the table with the clues checked off:
Organism Clues
Deer Tracks, droppings
Rabbit Tracks, droppings
Bear Tracks, droppings, fur
Beaver Dam, lodge
Do turning off water when washing dishes help save water
Answers
Answer:
No because u need the water to clean your hands,maybe you can save water by scrubbing your hands then after u turn the water on,perhaps that could be saving water
Explanation:
Answer:
Yesss of course
Explanation:
Saving because you dont waste water
Which substance represents a compound?
1. C(s)
2. Co(s)
3. CO(g)
4. O2(g)
Answers
Option 3, CO(g), which stands for carbon monoxide, is the chemical that stands in for a compound.
A compound is a material that is created chemically by combining two or more separate elements in a specific order. Because it is made up of two separate elements, carbon (C) and oxygen (O), chemically joined in a specific ratio of 1:1, carbon monoxide is a compound.
Carbon in its solid state is depicted in option 1 as C(s). Cobalt is shown as option 2's Co(s), which is the solid form of the element. Instead of a compound, option 4 (O2(g)) symbolises the diatomic molecule oxygen, which is made up of two oxygen atoms chemically linked together.
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How can you determine the total number of electrons that an atom has from the Periodic Table?
Answers
Answer:
The number of protons in the nucleus of the atom is equal to the atomic number (Z).
The number of electrons in a neutral atom is equal to the number of protons.
Hope it worked
Which statements are true about the rainforest climate? (Select all that apply.)
They have low temperatures.
They receive a lot of precipitation.
They receive little precipitation.
They have high temperatures.
Answers
Answer:Answer:They have high temperatures and They receive a lot of precipitation.
Explanation:
Answer:
They receive a lot of precipitation. They have high temperatures.
Explanation:
(answered on edge)
Calculate the percent by mass of each element.
%N = 35 %
%H = 5.0 %
%O = 60 %
Answers
Answer:
N=35%. so 35/100*7 =2.45%
H=5.0 so 5/100*1=0.05%
o=60% so 60/100*8=4.8%
How many grams of NaF are needed to make 6.3 liters of a 3.6
molar solution?
Answers
Answer:
9.7 × 10² g NaF.
Explanation:
Molarity is defined by the amount of solute (mols) over the volume of solution (liters):
\(\displaystyle \text{Molarity} = \frac{\text{mols solute}}{\text{L solution}}\)
We want to create 6.3 liters of a 3.6 molar solution of NaF.
Solve for the amount of NaF necessary:
\(\displaystyle \begin{aligned} (3.6\text{ M}) & = \frac{\text{ mol NaF}}{6.3\text{ L}} \\ \\ \text{mol NaF} & = 23 \text{ mol}\end{aligned}\)
Therefore, about 23 moles of NaF is required.
Convert from moles to grams. The molecular weight of NaF is 41.99 g/mol:
\(\displaystyle 23\text{ mol NaF} \cdot \frac{41.99\text{ g NaF}}{1\text{ mol NaF}} = 9.7\times 10^2\text{ g NaF}\)
Therefore, about 970 grams of NaF is needed to create the solution.
How many grams of AgCl are produced from 10.0 g AgNO3?
Answers
Answer:
Equation of Reaction = AgNO3 (aq) + NaCl (aq) → AgCl (s) + NaNO3 (aq)
Steps:
1. Find the moles of AgNO3 with formula n= Mass/Mr (molecular mass)
so you will get moles= 10.0/ 169.87 = 0.05886854654
2. Using stoichiometry you know the equation has 1 mole so the moles of AgCl are gonna be the same; therefore, you will use again the same formula.
3. moles= mass/molecular mass
0.05886854654 = x/ 143.32
You rearrange the formula to find the mass
so mass = moles x molecular mass
mass = 0.05886854654 x 143.32
mass= 8.44 grams
Explanation:
To make a solution for an experiment, Gunther needs to add 40 g of a solute to 100 g of water. When making the solution at room temperature, he could only add 34 grams before the solute settled out.
What could he do to dissolve the remaining 6 grams of the solute?
Put the solution in an ice bath, dissolve the solute, and let the solution return to room temperature.
Heat the solution, dissolve the solute, and let the solution cool verifying nothing settled out.
Add more water, boil the solution, and dissolve the solute until the some of the water evaporates.
Keep the solution at room temperature, add more water, and dissolve the excess solute.
Answers
Answer:
B. Heat the solution, dissolve the solute, and let the solution cool verifying nothing settled out.
Explanation:
What Gunther should do is to heat the solution, dissolve the solute, and let the solution cool verifying nothing settled out.
A solution is composed of a solute and a solvent. The solubility of a solute in a solvent depends on temperature. Especially for solids, solubility increased when the temperature is increased.
Now, from the question, Gunther needs to add 40 g of a solute to 100 g of water. He added 34 grams before the solute settled out. In this case, he needed to dissolve the remaining 6 grams. What Gunther should do is to to heat the solution, dissolve the solute, and let the solution cool verifying nothing settled out.
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quizzlet consider a component made of joined copper and iron pieces that will be exposed to salt water conditions as pictured here (top image labels what is what). which placement(s) of a plastic coating (a, b, c, or d below) could be used to prevent galvanic corrosion?
Answers
The placement of a plastic coating (a, b, c, or d below) that could be used to prevent galvanic corrosion would depend on the type of plastic coating being used and the specifics of the joined copper and iron pieces that are exposed to salt water conditions.
Generally, a plastic coating should be applied to prevent any direct contact between the copper and iron pieces. Placement “a” and “b” could both be used, as they would create a barrier between the two pieces, while placement “c” and “d” would not be as effective because there would still be direct contact between the two pieces.
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What is a lock and key model?
How does it allow enzymes in the human body to lower activation energy.
Answers
Answer:
It's basically an active site of an enzyme precisely fits a specific substrate. It reduces the energy that is well needed for reactants that come together.
Thermodynamics
Can we consider the following to be ideal gases? (a) N2 at
50oC, 5bar,
(b) CO2 at 50oC, 5bar, (c) Water at 1200oC,
5bar, (d) Water at
100oC, 1bar.
Answers
The following are the explanations for each substance.
(a) N2 at 50°C, 5 bar: The given substance can be considered as an ideal gas since it is at a low pressure (5 bar). The ideal gas equation PV = nRT can be used to determine the properties of the given gas.
(b) CO2 at 50°C, 5 bar: The given substance can be considered as a real gas since it is at a moderate pressure. We cannot use the ideal gas equation to determine the properties of the given gas since it does not obey the ideal gas law at such a moderate pressure.
(c) Water at 1200°C, 5 bar: The given substance cannot be considered as an ideal gas since it is at a high temperature and a moderate pressure. Water at such conditions cannot be approximated as an ideal gas and hence we cannot use the ideal gas equation to determine its properties.
(d) Water at 100°C, 1 bar: The given substance can be considered as an ideal gas since it is at a low pressure (1 bar). The ideal gas equation PV = nRT can be used to determine the properties of the given gas.
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for the following pairs of elements, identify the element that would be expected to be more electronegative based on periodic tables
Answers
Answer:
Chlorine (Cl)
Explanation:
Bromine: 2.96 electronegative
Chlorine: 3.16 electronegative
3.16 > 2.96
Hope this helps!!
Which of the conservationists discussed earlier in this unit is
credited with founding the Wilderness Society?
A
Bob Marshall
B John Muir
с
Rachel Carson
thing
D
Rosalie Edge
Answers
Answer: A
Explanation: Bob Marshall
The correct answer is A. The conservationist credited with founding the Wilderness Society is Bob Marshall.
Bob Marshall was an American forester, botanist, traveler, climber, writer and social activist who advocated the preservation of unspoiled wildlife.
He actively contributed to the development and adoption of environmental regulations prohibiting the construction of roads in vast federal specially protected natural areas. In 1935 he became one of the founders of the public environmental organization The Wilderness Society and its main sponsor.
Today Bob Marshall is considered one of the main initiators of the wildlife movement in the United States. Several geographic features are named after him, including the Bob Marshall Wilderness Nature Reserve in Montana and the Marshall Mountain on the Adirondack Ridge.
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I’ve tried to do the problem but it’s confusing
Answers
Answer:
Explanation:
The equation for calculating the amount of heat released is:
q = mcΔT
where:
q = heat released (in joules)
m = mass of the substance (in grams)
c = specific heat capacity (in J/g·°C)
ΔT = change in temperature (in degrees Celsius)
Given:
m = 30 g
ΔT = 96°C - 25°C = 71°C
c = 4.184 J/g·°C (for water)
so
q = (30 g)(4.184 J/g·°C)(71°C) = 8.91*71 = 635.11 J
Therefore, 635.11 J of heat is released when 30g of water cools down from 96 degree celsius to 25 degree celsius
Note that this calculation is valid only if the process is adiabatic or no heat is exchanged with the environment.
You arrive at a crime scene and are told the body of the victim is in the 10 m deep pool. You walk over to what you are told is a 12 m in diameter, cylindrical pool. From the outside of the pool, you can see that the body looks badly burnt. Your partner says, “It looks like our victim had been burned alive and tried to put out the fire by jumping in the pool. The victim likely drowned to death.”
Something does not sit right with you though. If there was a fire, where did it start? There are no signs of combustion anywhere. You aren’t so sure and ask the crime scene investigator to run a sample of the pool water before letting anybody try to pull the body out.
The CSI comes back to you and tells you that normal pool water pH is roughly around 7.2, but the pool pH is actually highly basic at a level of 13 with a concentration of hydroxide ions at 1.0 x 10-1 mol/L. It becomes obvious to you that the body wasn’t burned before going in to the pool , but AFTER and there was no fire needed!
You order the body to be removed from the pool, but the CSI interjects, “It would be too dangerous with a pH that high. I suggest you get some vinegar from the store and pour it in to the pool before hand to drop the pH to 7. Draining the pool would take far too long and we need to examine the body as soon as possible.” She asks one of your constables to go to the store to purchase 5 – 4L jugs of vinegar (pH = 2) to pour in the pool, as she states it is enough to bring the pH to a safe level of 7.
It sounds like it could be enough vinegar based on your knowledge of acids and bases, but you want to double-check her estimate before sending your constable to the store. Verify whether or not she is correct using calculations. A diagram may help you with your calculations.
Hint 1: 1m3 = 1000L
Hint 2: Vcylinder = πr2h
Answers
Answer:
The vinegar is not enough to neutralize the pool.
Explanation:
The [OH⁻] in the pool is 1.0x10⁻¹mol / L. To know how many moles of OH⁻ are in the solution, you must calculate volume of the pool thus:
V(pool) = πr²h
Where r, radius is d/2 = 12m/2 = 6m and h is deep of the pool = 10m
V(pool) = π(6m)²*10
V(pool) = 1131m³
As 1m³ = 1000L:
1131m³ × (1000L / 1m³) = 1131000L in the pool.
And moles of OH⁻ are:
1.0x10⁻¹mol / L ₓ 1131000L = 131100 moles of OH⁻ are in the pool
The neutralization of OH⁻ with H⁺ is:
OH⁻ + H⁺ → H₂O
That means to neutralize the pool you must add 131100 moles of H⁺.
The H⁺ concentration in a vinegar pH = 2 is:
pH = -log [H⁺]
2 = -log [H⁺]
1x10⁻²M = [H⁺]
4L are just 4x10⁻² moles of [H⁺]. As you need 131100 moles of H⁺:
The vinegar is not enough to neutralize the pool.The procedure calls for 2.0 ml of concentrated nitric acid. how many moles is this?
Answers
Answer:
ρHNO₃= 1.51 g/cm3
ρ = m/V
m = ρ x V
m = (1.51 g/cm3)(2 cm3)= 3.02 g de HNO₃
n = m/PM = 3.02 g/63.01 g/mol = 0.0479 mol de HNO₃
Explanation:
2 mL of concentrated nitric acid equals 0.0479 mol
a particular protein sample is found to have 1 atom of iron in its chemical formula. if the mass percent of fe in the compound is 0.330% fe, what is the molar mass of the protein?
Answers
The molar mass of the protein is 16,922.73 g/mol.
Given:
A protein sample, with 1 atom of iron in its chemical formula.
The mass percent of iron in the protein is 0.330%.
To find:
The molar mass of protein
Solution:
The mass percentage of iron in protein = 0.330%
The atomic mass of iron = 55.845 g/mol
Number of iron atoms in protein = 1
The molar mass of protein = M
The mass percentage of elements in a compound is given by:
\(=\frac{\text{Atomic mass of element}\times \text{Number of atoms of element}}{\text{Molar mass of compound}}\times 100\)
The percentage of iron in the protein will :
\(0.330\%=\frac{55.845g/mol\times 1}{M}\times 100\\\\M=\frac{55.845g/mol\times 1}{0.330}\times 100\\\\=16,922.73 g/mol\)
The molar mass of the protein is 16,922.73 g/mol.
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True/False? reaction of an acid and base to produce a salt and water.
Answers
True. The reaction of an acid and a base is a type of chemical reaction known as an acid-base reaction or a neutralization reaction.
In this type of reaction, an acid reacts with a base to produce a salt and water. The acid donates a hydrogen ion (H+) to the base, which accepts the hydrogen ion and forms a water molecule.
The remaining parts of the acid and base then combine to form a salt. For example, when hydrochloric acid (HCl) reacts with sodium hydroxide (NaOH), the products are sodium chloride (NaCl) and water (H2O).
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A __________________ election is the type of election in which candidates from the same party compete against one another to try to win the party's nomination.
Answers
A primary election is the type of election in which candidates from the same party compete against one another to try to win the party's nomination.
A formal procedure of communal decision-making, an election that's how a population chooses a person or people to hold public office.
A general election would be one that takes place simultaneously throughout all constituencies, usually the day before or within a few days. When a member dies or resigns, elections may be conducted just for that constituency to replace the vacancy.
For positions with fixed terms, such as that of the president, governor, or legislator, primaries are frequently held. There are normally no special primaries for positions that could be replaced without holding a new election, including such a prime minister.
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What the Purpose of seeds
Answers
Answer:
The purpose of all seed is reproduction and is to grow a new plant, thus propagating the species.
A cake recipe calls for 0.75 kg of butter. How many grams of butter would be needed for 4 cakes
Answers
Answer:
So if you divide the kg of butter and the cake that will be your answer and then you should have a fraction so the fraction would be 0.25 over 2 because you simplified it. 0.25/2
Explanation:
SnO₂ + 2H₂
+ 2 H2 → Sn + 2 H2O
Is it balanced or unbalanced
Answers
Answer:
I'm pretty sure it is unbalanced
Lights give off energy in the form of thermal energy and
energy
Answers
Answer: Energy, or the ability to do work, can exist in many different forms. ... The stage lights use electrical energy and give off both light energy and thermal energy, commonly called heat.
Explanation:
Hope this help
Are the following chemical equations reversible or irreversible?
2H2O ←→ H3O+ + OH-
HA + H2O ←→ A- + H3O+
HA + H2O → A- + H3O+
MOH → M+ + OH-
Answers
The first two chemical equations are reversible while the other two are irreversible.
What are chemical equations?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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Balance the following equation
_MgF2 + _Li2CO3 -> _MgCO3 + _LiF
Answers
Answer:
1 MgF2 + 1 Li2CO3 --> 1 MgCO3 + 2 LiF
Explanation: