Question

Is irreversible entropy less than its reversible entropy?

Answer 1

There is no equality between the entropy change and the quantity for anirreversible process. The equality is only applicable for a reversibleprocess. ... The lost work ( in Equation (6.4)) is always greater than zero, sothe only way to decrease the entropyof a system is through heat transfer.

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Answer 2

The second law of thermodynamics states that in a reversible process, the entropy of the universe is constant, whereas in an irreversible process, such as the transfer of heat from a hot object to a cold object, the entropy of the universe increases.

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