Consider a perfect monoatomic gas at pressure $p_i$ 1.2 atm and temperature $T_i$ 300K, that is in equilibrium inside a cylinder having a volume $V_i=1L$ and which piston has a mass of 1kg and is at an height of 50 cm. Admit that a mass M=3.13kg is over the piston. When that mass is removed, the gas suffers an adiabatic expansion until a final pressure pf=1.04837, a final temperature Tf and a final volume Vf.
What is the value of Vi/Vf?
3. The Attempt at a Solution [/B]
So my immediate thought was to use the equation of real gases
We will have then
But I also don't know Tf so I'm stuck. Can someone give me a hint?