1. The problem statement, all variables and given/known data There is a lid on a .25m diameter, .30m tall cylindrical container enclosing .021kg of air. The lid is held in place solely by atmospheric pressure. It take 220N of force to pull of the lid at an atmospheric pressure of 101kPa. What is the Temperature of the enclosed gas. 2. Relevant equations PV =nRT 3. The attempt at a solution So got the volume of the container by doing .3m * pi * (.25m/2)^2 which is .0147m^3 than I got the density of the container doing (.021kg/.0147m^3) = 1.43kg/m^3 At this point I am lost I don't understand what to do with the 220N force on the lid or how to get the pressure of the inside of the container.