1. The problem statement, all variables and given/known data An ideal diatomic gas, in a cylinder with a moveable piston undergoes the rectangular cyclic process shown below. Assume that the temperature is always such that the translational and rotational degrees of freedom are active but the vibrational modes are "frozen out". Also, assume that the only type of work done on the gas is the quasi-static compression-expansion work. The diagram show a square process, 1) p1 to p2 at constand v1 2) v1 to v2 at constant p2 3)p2 to p1 at constant v2 4) v2 to v1 at constant p1 For each of the four steps 1) through 4), compute the work done on the gas, the heat added to the gas and the change in the internal energy of the gas. Express all answers in terms of P1, P2, V1 and V2 and suggest how each of the steps in the cycle could be physically achieved. 2. Relevant equations PV = nRT U = 1/2 NfkT 3. The attempt at a solution I'm a bit thrown off by the quasistatic work, for the pressure change parts I would have used W = integral of PdV but quasistatic work means its done over an infinite amount of time, so do I not use that?