Hi there! I have to determine the work done of a reversible adiabatic expansion. Becauce the system is adiabatic: Q = 0 so [tex]\Delta[/tex]U = Wrev Becauce both the pressure and the volume changes I can't use W = pex[tex]\Delta[/tex]V. 1. The problem statement, all variables and given/known data Cv, Cp, Ti, Tf, Pi, Pf, Vi, Vf are known 3. The attempt at a solution I thought at first that I could use [tex]\Delta[/tex]U = CV.[tex]\Delta[/tex]T but the volume is not constant so I don't know if I could use it. Who can help me find the right formula? Thanx in Advance!!