1. The problem statement, all variables and given/known data One m3 of an ideal gas expands in an isothermal process from 760 to 350 kPa. Determine the specific work done by the gas. 2. Relevant equations ω=W/m 1W2=mRTln(P1/P2) = P1V1ln(P1/P2) P1V1=P2V2 3. The attempt at a solution P1V1ln(P1/P2) = (760)(1)ln(760/350) = 589.29kJ V2=(760)(1)/(350) = 2.17m3 I tried doing PV=mRT using STP and my mass calculated was .31kg but it doesn't seem right. How do I find mass?