Calculate the internal energy change for each of the following. (a) One hundred eleven (111) joules of work are required to compress a gas. At the same time, the gas releases 26 J of heat. WebAssign will check your answer for the correct number of significant figures. ad Incorrect: Your answer is incorrect. seenKey 85 J (b) A piston is compressed from a volume of 8.23 L to 2.75 L against a constant pressure of 1.88 atm. In the process, there is a heat gain by the system of 360. J.