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College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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
Transcribed Image Text:(a) What is the unit of "specific entropy"? Is it an extensive property?
(b) What is an isentropic process? Please give an example.
(c) Explain the increase of entropy principle.
(d) The entropy of a hot baked pizza decreases as it cools. Is this a violation of the increase of
entropy principle? Explain.
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- Two moles of an ideal gas undergo an irreversible isothermal expansion fromVa=100 liters to Vb=300 liters at T=300K.(a) What is the entropy change for this process?(b) What is the Gibbs free energy change?(c) Is this process spontaneous or not? Explain your answer.arrow_forwardWhen a metal bar is temporarily connected between a hot reservoir at Th and a cold reservoir at Tc, the energy transferred by heat from the hot reservoir to the cold reservoir is Qh. In this irreversible process, find expressions for the change in entropy of the following. (Use any variable or symbol stated above as necessary.) (a) the hot reservoir ΔSh = (b) the cold reservoir ΔSc = (c) the Universe ΔSU =arrow_forwardTopic: Thermodyamics (also included in Chem). Please explain what the Carnot cycle or a heat engine is about step by step.arrow_forward
- Prove that the “cycle” consisting of only two adiabatic steps (reversible expansion and then compression) will have no efficiency since no work can be produced. Will it violate the 2nd law of the thermodynamics? Clear explain your answer.arrow_forwardConsider the adiabatic free expansion of n moles of an ideal gas from volume V₁ to volume V2, where V₂ > V₁. [Hint: check lecture 19, chapter 5.6, process number 5. Note that such a process happens quasi-instantaneously, thus, it is irreversible.] (1) Calculate the change in entropy of the gas. (2) Calculate the change in entropy of the environment. (3) Evaluate the total change in entropy (AS = ASgas + ASenv.) for 1 mole, with V₂ = 2V/₁.arrow_forwardPlease describe to me the laws of thermodynamics. There are a certain number of them and therefore you must have all of them. Each should be labeled with it's number. For instance "The First Law of thermodynamics says that..."arrow_forward
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