Chapter 2, Problem 2.6NP

A 1.50 mole sample of an ideal gas at $\text{28}.5°\text{C}$ expands isothermally from an initial volume of $\text{22}.{\text{5 dm}}^{\text{3}}$ to a final volume of $\text{75}.{\text{5 dm}}^{\text{3}}$. Calculate w for this process (a) for expansion against an external pressure of $\text{0}\text{.498}\times \text{1}{0}^{\text{5}}\text{Pa}$, and (b) for a reversible expansion.