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Suppose we vaporize a mole of liquid water at 25 °C and another mole of water at 100 °C.

(a) Assuming that the enthalpy of vaporization of water does not change much between 25 °C and 100 °C, which process involves the larger change in entropy?

(b) Does the entropy change in either process depend on whether we carry out the process reversibly or not? Explain.

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