10 mol of an ideal gas are placed inside an insulated piston and cylinder arrangement. Initially, the gas is at 3.2 atm and 350 K. A catch is removed, and the gas rapidly expands against a constant restraining pressure of 1.2 atm, until the final pressure of the gas inside the cylinder equalled 1.2 atm. How much work does the gas do, and what is the final temperature of the gas? For this gas, Cv=35 J/mol K.