An ideal gas at pressure, volume, and temperature, Po, Vo, and To, respectively, is heated to point A, allowed to expand to point B also at A's temperature 2To, and then returned to the original condition. The internal energy decreases by 3P,VO/2 going from point B to point To. How much heat left or entered the gas from point B to point To? 2P 27 Po To 1. V. 21

An ideal gas at pressure, volume, and temperature, Po, Vo, and To, respectively, is heated to point A, allowed to expand to point B also at A's temperature 2To, and then returned to the original condition. The internal energy decreases by 3P,VO/2 going from point B to point To. How much heat left or entered the gas from point B to point To? 2P 27 Po To 1. V. 21