1. The problem statement, all variables and given/known data You Need to find the enthalpy of sublimation of solid A at 300K. The following equilibrium vapor pressure measurements have been made of pure A : (1) At 250K, the pressure is 0.258 bar and (2) At 350K, the pressure is 2.00 bar. The following heat capacity data is known: Cp(solid) = 40 J/(mol K) ; Cp(vapor) = 40 + 0.1*T J/(mol K) Calculate the enthalpy of sublimation, accounting for the temperature variation of the enthalpy of sublimation. 2. Relevant equations Claussius-Clapeyron Eqtn: dP/P = ((delta H sublimation) / R) * (dT / T^2) Change in Enthalpy (Ideal) = integral (Cp * dT) 3. The attempt at a solution None. I cannot think of a way of including the temperature dependence of the heat of sublimation.