1. The problem statement, all variables and given/known data A 4.15 mol sample of a diatomic ideal gas (γ = 1.4) expands slowly and adiabatically from a pressure of 5.60 atm and a volume of 13.5 L to a final volume of 34.5 L. Find initial+final temperatures 2. Relevant equations pV/T (all initial) = pV/T (all final) 3. The attempt at a solution First I was told to solve for the final pressure so I did that easily by doing: P(final) = P(intial) * (Vi/Vf)^γ and got 1.5 atm I am confused on how you find the initial temp if they didn't give the final and vice versa. That's all I really need help with.