What statement about heat capacity is true for biological systems but can be dea
ID: 884412 • Letter: W
Question
What statement about heat capacity is true for biological systems but can be deadly if applied to other systems?
d-The heat capacity of liquid water is equal to that of water vapor.
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Which of these systems best approximates a reversible system?
d-Expansion against zero external pressure
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Which of the following conditions should be met to make a process perfectly reversible?
Check all that apply.
c-The system should not be close to equilibrium.
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Why is the molar constant volume heat capacity higher for F2 than for the other listed 2nd row diatomics?
d-The electronic states of F2 are readily available to store energy due to its polarizability.
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Why do CP and Cv have different values for gas systems?
d-Cp is lower because it takes less heat to expand in a constant pressure chamber.
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When are some of the assumptions of the perfect gas law most likely to be invalid?
d-At low pressure.
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a- Heat capacities do not change throughout the liquid phase. b- The heat capacity of liquid water is equal to that of water ice. c- The heat capacity of water can be considered constant near room temperature. See sec. 2.5d-The heat capacity of liquid water is equal to that of water vapor.
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Which of these systems best approximates a reversible system?
a-The melting of ice on a warm summer day. b-Rapid acceleration of a vehicle to avoid frictional losses in the drive train. c-Boiling of water by a heater at 100 ºC and 1 bar.d-Expansion against zero external pressure
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Which of the following conditions should be met to make a process perfectly reversible?
Check all that apply.
a- Any mechanical interactions taking place in the process should be frictionless. b-Any thermal interactions taking place in the process should occur across infinitesimal temperature or pressure gradients.c-The system should not be close to equilibrium.
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Why is the molar constant volume heat capacity higher for F2 than for the other listed 2nd row diatomics?
a-Because the mass is greater for F2, it does not readily rotate which increases Cv,m. b-Due to the high electronegativity of F2, the atoms being to fuse their nuclei which increases Cv,m. c-The reduced mass of F2 is larger which makes the vibrational states more available to store energy.d-The electronic states of F2 are readily available to store energy due to its polarizability.
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Why do CP and Cv have different values for gas systems?
a-They are not; Cv is just defined at constant volume whereas Cp is defined at constant pressure. b-Cv is higher because it takes more heat to expand a gas in a constant volume chamber. c-Cp is higher because it can include the expansion of the gas against outside pressure.d-Cp is lower because it takes less heat to expand in a constant pressure chamber.
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When are some of the assumptions of the perfect gas law most likely to be invalid?
a-At high temperature. b- At high pressure. c-When the pressure is high and/or temperature is low.d-At low pressure.
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Explanation / Answer
1.
The heat capacity of water can be considered constant near room temperature.
Reason:
Heat capcity changes with temperature. It is very much different for solid,liquid and gas
2.
a-The melting of ice on a warm summer day.
c-Boiling of water by a heater at 100 ºC and 1 bar.
3.
b-Any thermal interactions taking place in the process should occur across infinitesimal temperature or pressure gradients.
There are multiple question in this. I am answering 1st 3 for you. Please ask rest as different question
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