1. The problem statement, all variables and given/known data A thermally isolated container is filled with 2.3 mol of an ideal gas at T = 0°C.The gas is then compressed from 1.9 m3 to 0.3 m3. What is the final internal energy U of the gas? (Assume the process occurs at constant pressure.) 2. Relevant equations U=3/2nRT U=Q+W W=pΔV pV=nRT 3. The attempt at a solution Q=0, so U=W p(1.9)=(2.3)(8.314)(273.15) p(1.9)=5223.2 p=2749.1 W=pΔV =(2749.1)(0.3-1.9) =(2749.1)(-1.6) =-4398.6 The actual answer is 1.24kJ. I attempted this as well just to see. U=3/2nRT =3/2(2.3)(8.314)(273.15) =7834.8 Clearly I am lost. Any help would be greatly appreciated.