An insulated cylinder of 0.4m diameter and 0.8 m length contains 1 kg of oxygen. Paddle work is done on the gas to increase its pressure from 3.0 kgf /cm2 to 60 kgf / cm2. Determine the change in
(i) internal energy,
(ii) work done on the gas and the change in its enthalpy.
Assume that Cp = 0.218 kcal/ kg°C and Cv = 0.154 kcal / kg°C.
If the cylinder is now emptied to the atmospheric pressure through a valve, the flow velocity being negligible, determine the temperature and mass of oxygen left in the cylinder.