Which of the following statements about entropy is true?

a. Entropy increases going from one trophic level to another.

b. Increases in entropy lead to reversible processes.

c. A system’s work output is limited when changes in entropy do not occur.

d. All of the above

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Carl David CepedaLv10

24 Nov 2020

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Indicate whether each statement is true or false. (a) All spontaneous processes are irreversible. (b) The entropy of the universe increases for spontaneous processes. (c) The change in entropy of the surroundings is equal in magnitude and opposite in sign for the change in entropy of the system, for an irreversible process. (d) The maximum amount of work can be gotten out of a system that undergoes an irreversible process, as compared to a reversible process.

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Which of the following statements are TRUE? Pick ALL answers that apply.

	A.	When a cup of hot coffee cools, the entropy change of the system (ie, cup of coffee) is negative.
	B.	A reversible adiabatic process is always isentropic, but an isentropic process is not necessarily reversible adiabatic.
	C.	When a cup of coffee cools, the entropy change of the system (ie, cup of coffee) is positive.
	D.	The entropy change of a system that undergoes a thermodynamic cycle is dependent on whether or not the processes are reversible.
	E.	When a cup of coffee cools, the total entropy change of the system and surroundings is negative.