1. The problem statement, all variables and given/known data Heat flows into an ideal gas at a constant volume. The pressure increases from 1.5 atm to 5.5 atm. Next the gas is compressed at constant pressure from 5.0 L to 2.5 L and goes back to its original temperature. 1.What is the total work done on the gas in the process? 2.What is the total change in internal energy? 3.What is the total heat flow of the process? 2. Relevant equations U = Q + W W = -P*ΔV 3. The attempt at a solution 1. No work is done in the first process because the volume is constant. The work done on the gas in the second process is W = -(5.5 atm) * (2.5 L - 5.5 L) = 1390J 2. The change in internal energy is 0 because there is no net change in temperature. 3. 1390J of heat must have left the system because U = Q + W. Is this right?