Chemistry

Problem

A sample of ideal gas at

350\,\text{K}

first expands reversibly and isothermally so that its entropy increases by

8\,\text{J\,K}^{-1}

. It is then compressed reversibly and isothermally at the same temperature until its entropy decreases by

10\,\text{J\,K}^{-1}

. What is the net heat exchanged with the gas over the entire two-step process? a)

+2800\,\text{J}

absorbed b)

-700\,\text{J}

released c)

+700\,\text{J}

absorbed d)

-3500\,\text{J}

released