1. The problem statement, all variables and given/known data Gas obeys Equation of State, PV=RT/(1-bP), where b is a temperature dependent constant. Isothermal process (T is constant) V goes from V1 to V2 P goes from P1 to P2 Show that the amount of Work is W=(P1V1-P2V2)+RTln[(P22V2)/(P12V1) 2. Relevant equations W=-∫P(V)dV ΔU=Q+W 3. The attempt at a solution Solved PV=RT/(1-bP) for P in terms of V P=(-1[itex]\pm[/itex]Sqrt[1-4bRT/V])/(2b) I don't know how to really integrate that expression. I used Wolfram to eventually get this expression: ∫P(V)dV=-V/(2b)[itex]\pm[/itex]RTln(2V(Sqrt[1-4bRT/V]+1)-4bRT)-V*Sqrt[1-4bRT/V] I'm pretty sure that this isn't the approach to solve this problem. Can someone point me in the right direction? Thanks in advance!