1. The problem statement, all variables and given/known data How do you express work in an isothermal increase of pressure of a solid in terms of the initial and final pressure? 2. Relevant equations van der waals equation W=Integral of PdV (P-na/v^2)(v-nb)=nKT P=pressure V=volume n=number of molecules(constant) T=temperature(constant) 3. The attempt at a solution d/dV[(P-na/V^2)(V-nb)=nKT]* The problem here is that dP and dV are very hard to separate so it is hard to substitute dP in W=integral of PdV.