Hello ! I have troube doing a calculation. Let's say we have a volume Vi in a tank at a pressure Pi. If I let my tank open, the tank's liquid will start to boil to keep the pressure Pi inside the tank. Now, at the end, I will have a volume Vf in the tank, and still a pressure Pi. But the temperature of the tank will have dropped (lets consider adiabatic), which formula could I use to find the final Temperature ? (Maybe using energy of phase change?) Thank you !