One mole of an ideal monoatomic gas expands isothermally and reversibly from an initial volume of 1 L to a final volume of 10 L. What is the exact entropy change of the system () in cal/K? (Use cal/K-

Question

One mole of an ideal monoatomic gas expands isothermally and reversibly from an initial volume of 1 L to a final volume of 10 L. What is the exact entropy change of the system ($\Delta S_{sys}$) in cal/K? (Use $R = 2$ cal/K-mol)

Prashant Kotian · Accepted Answer

Correct answer: A. For an isothermal expansion of an ideal gas, the temperature is constant, making the term zero. Thus, . Substituting the parameters: cal/K.

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