1. The problem statement, all variables and given/known data Two moles of carbon monoxide (CO) start at a pressure of 1.2 atm and a volume of 30 liters. The gas is then compressed adiabatically to 1/3 this volume. Assume that the gas may be treated as ideal. What is the change in the internal energy of the gas? n = 1.2 atm V2 = 10L V1 = 30L Cp = 29.16 J/(mol * K) 2. Relevant equations Q = dU + W 3. The attempt at a solution dU = dQ - dW dU = nCpdT - pdV dT is not known, and I can't go any further.