1. The problem statement, all variables and given/known data An ideal monatomic gas expands isothermally from 0.590 m3 to 1.25 m3 at a constant temperature of 780 K. If the initial pressure is 1.20x10^5 Pa. (a) Find the work done on the gas. (b) Find the thermal energy transfer Q. (c) Find the change in the internal energy. 2. Relevant equations W= -PV deltaU=Q-W PfVf/PiVi = Tf/Ti 3. The attempt at a solution I know I need to find the final pressure...but I'm not sure how to. Do I use Pf*1.35/1.2x10^5 = 780k?