initial volume of a system when the change in internal energy is 982 J

Question

a system fitted with a piston contracts when it gives off 52.3 J of heat to the surroundings. the piston is working against a pressure of .661 atm. the final volume is 50.6 L. what was the initial volume of the system if the change in internal energy of the system is 982 J?

Answer 1

change in internal energy = - pressure x change in volume