1. The problem statement, all variables and given/known data There's .1 mole of an ideal gas trapped in a cylinder with a movable piston. If Pi= Pf= 5000Pa, Vi= .04 m^3, Vf= .08m^3, Q=500J,,,Find W, change in (U), Ti and Tf. 2. Relevant equations change in U = Q+W W= -p change in V 3. The attempt at a solution W= 200J change in U = 700J Ti= Tf= i don't know how to get Ti and Tf... I am not sure whether 200J and 700J are right either.. PLease help me!! Thank you!