1. The problem statement, all variables and given/known data Consider a reversible isothermal expansion of two moles of CO2 from 1 L to 60 L at 298 K. Assume that CO2 obeys an equation of state P = nRT/(V − nb) − n2a/V 2 with b = .04286 L mol−1 and a = 3.658 L2 bar mol−2. (a) Calculate W. 2. Relevant equations P = nRT/(V − nb) − n^(2)a/V^2 3. The attempt at a solution dW = -PextdV W = -P[(int from V1 to V2)dV = -P(60L-1L) My issue here is, I dont know how to find P. The Van der Walls gas equation is posted above, my only issue is I dont know which V to use... Initial? Final? The difference of the two? Thanks for the help!