Chapter 2, Problem 2.3NP

A 2.50 mole sample of an ideal gas, for which $C_{v,m}=3R/2$, is subjected to two successive changes in state: (1) From $\text{25}.0°\text{C}$ and $\text{125}\times \text{1}{0}^{\text{3}}\text{Pa}$, the gas is expanded isothermally against a constant pressure of $\text{15}\text{.2}\times \text{1}{0}^{\text{3}}\text{Pa}$ to twice the initial volume. (2) At the end of the previous process, the gas is cooled at constant volume from $\text{25}.0°\text{C}$ to $-\text{29}.0°\text{C}$. Calculate q, w, $\Delta U$, and $\Delta H$ for each of the stages. Also calculate q, w, $\Delta U$, and $\Delta H$ for the complete process.