Hi, 1. The problem statement, all variables and given/known data One mole of a diatomic ideal gas performs a transformation from an initial state for which the temp. and vol. are respectively 291K and 21000 cc, to a final state in which temp. and vol. are 305K and 12700cc - a straight line in the P,V diagram. Find work performed, and heat absorbed by sys. 3. The attempt at a solution I'm wondering which is the best approach. I could calc. the pressures and use them to express the pressure as a linear function of the volume, and integrate that between the two volumes (int(P dV)) to get the work. But perhaps I'm just not thinking, and there is a more obvious, elegant approach to this whole question (?) Cheers.