B. Consider the case where AS > 0, AV < 0. Which statement is correct about this process? a. This process will be spontaneous at all temperatures b. This process is not spontaneous at any temperature c. This process occurs spontaneously at lower temperatures and doesn't occur spontaneously at higher temperatures d. This process doesn't occur spontaneously at lower temperatures and occurs spontaneously at higher temperatures C. Consider the case where AS < 0, AV > 0. Which statement is correct about this process? a. This process will be spontaneous at all temperatures b. This process is not spontaneous at any temperature c. This process occurs spontaneously at lower temperatures and doesn't occur spontaneously at higher temperatures d. This process doesn't occur spontaneously at lower temperatures and occurs spontaneously at higher temperatures

B. Consider the case where AS > 0, AV < 0. Which statement is correct about this process? a. This process will be spontaneous at all temperatures b. This process is not spontaneous at any temperature c. This process occurs spontaneously at lower temperatures and doesn't occur spontaneously at higher temperatures d. This process doesn't occur spontaneously at lower temperatures and occurs spontaneously at higher temperatures C. Consider the case where AS < 0, AV > 0. Which statement is correct about this process? a. This process will be spontaneous at all temperatures b. This process is not spontaneous at any temperature c. This process occurs spontaneously at lower temperatures and doesn't occur spontaneously at higher temperatures d. This process doesn't occur spontaneously at lower temperatures and occurs spontaneously at higher temperatures

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter15: Thermodynamics

Section: Chapter Questions

Problem 56PE: (a) How much heat transfer occurs from 20.0 kg of 90.0C water placed in contact with 20.0 kg of...

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A 1.00-mol sample of a monatomic ideal gas is taken through the cycle shown in Figure P22.76. At point A, the pressure, volume, and temperature are Pi, Vi, and Ti, respectively. In terms of R and Ti, find (a) the total energy entering the system by heat per cycle, (b) the total energy leaving the system by heat per cycle, and (c) the efficiency of an engine operating in this cycle. (d) Explain how the efficiency compares with that of an engine operating in a Carnot cycle between the same temperature extremes.
(a) How much heat transfer occurs from 20.0 kg of 90.0C water placed in contact with 20.0 kg of 10.0C water, producing a final temperature of 50.0C ? (b) How much work could a Carnot engine do with this heat transfer, assuming it operates between two reservoirs at constant temperatures of 90.0C and 10.0C ? (c) What increase in entropy is produced by mixing 20.0 kg of 90.0C water with 20.0 kg of 10.0C water? (d) Calculate the amount of work made unavailable by this mixing using a low temperature of 10.0C, and compare it with the work done by the Garnet engine. Explicitly show how you follow the steps in the Problem-Solving Strategies for Entropy. (e) Discuss how everyday processes make increasingly more energy unavailable to do work, as implied by this problem.
(a) Calculate the work done by the gas along the closed path shown below. The curved section between R and S is semicircular. (b) If the process is carried out in the opposite direction, what is the work done by the gas?
Assume a sample of an ideal gas is at room temperature. What action will necessarily make the entropy of the sample increase? (a) Transfer energy into it by heat, (b) Transfer energy into it irreversibly by heat, (c) Do work on it. (d) Increase either its temperature or its volume, without letting the other variable decrease, (e) None of those choices is correct.
(a) What is the hot reservoir temperature of a Carnot engine that has an eficiency of 42.0% and a cold reservoir temperature of 210C ? (b) What must the hot reservoir temperature be for a real heat engine that achieves 0.700 of the maximum eficiency, but still has an efficiency of 42.0% (and a cold reservoir at 27.0C )? (c) Does your answer imply practical limits to the efficiency of car gasoline engines?
(a) In reaching equilibrium, how much heat transfer occurs from 1.00 kg of water at 40.0C when it is placed in contact with 1.00 kg of 20.0C water in reaching equilibrium? (b) What is the change in entropy due to this heat transfer? (c) How much work is made unavailable, taking the lowest temperature to be 20.0C ? Explicitly show how you follow the steps in the Problem-Solving Strategies for Entropy.
Consider the cyclic process depicted in Figure P17.28. If Q is negative for the process BC and Eint is negative for the process CA, what are the signs of Q, W, and Eint that are associated with each of the three processes?
It is unlikely that a process can be isothermal unless it is a very slow process. Explain why? it is a very slow process. Explain why? Is the same true forisobaric and isochoric processes? Explain how?
14. a) What happens to the energy added to an ideal gas when it is heated a(i) constant volume (ii) constant pressure?A camot engine working between 300K and 600K has a work outpuof 8001 per cycle. What is the amount of heat energy supplied to theengine from source per cycle ?
3 A 1 mole of ideal gas initially at Pi=1 Pa, Vi=5 m , and Ti= 0°C is taken through a cycle as shown in above Figure. a) Find the temperature of gas at point C. b) Find the net work done on the gas per cycle. c) What is the net energy added by heat to the gas per cycle?
(II) (a) What is the coefficient of performance of an idealheat pump that extracts heat from 6°C air outside anddeposits heat inside a house at 24°C? (b) If this heat pumpoperates on 1200 W of electrical power, what is the maximumheat it can deliver into the house each hour? see the attached problem
The temperature at state A is 20.0ºC, that is 293 K. During the last test, you have found the temperature at state D is 73.0 K and n = 164 moles for this monatomic ideal gas. What is the work done by the gas for process A to D, in MJ (MegaJoules)? 1.0 atm = 1.00 × 105 Pa. Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.