1. The problem statement, all variables and given/known data Calculate a value of R, specific gas constant for air, from the values you have. Also calculate the work done in the compression process. 2. Relevant equations Pv = RT ρair = 1.2 kg/m^3 3. The attempt at a solution Have P,V and T data from an adiabatic compression. I think I need initial values for these but not sure what else. Also we have been given the density for air so the mass of the air in the tube, m = ρ*V = 2.903172 x 10^-4 kg. However this will change surely as volume decreases?