Exercise 8-1 One mole of a real gas initially at a pressure of 1.98 atm and contained in a flask having a volume of 8.

Exercise 8-1 One mole of a real gas initially at a pressure of 1.98 atm and contained in a flask having a volume of 8.27 L is suddenly expanded by opening a valve connecting the flask to a second flask, the latter having a volume of 7.64 L and containing a vacuum. During the process, 0.71 J of heat is absorbed by the gas from the surroundings. The final pressure of the gas is 1.033 atm. (a) What is the ΔU for this process? (b) What is ΔH?