Example #4 Cylinder filled with air,the mass of the piston and load is 195 kg.Good heat conduction through the wall.No friction. Remove the load (100 kg)>equilibrium state.Find: (1)Elevation of the piston,AL (2)Work done by the gas,given 0.72(T) (3)Heat transfer O AL A=100cm2 卫1h L=10cm t=27℃Po=771 nunHg 图 上游充通大学 March 7,2019 11 SHANGHAI JIAO TONG UNIVERSITYMarch 7, 2019 11 Cylinder filled with air, the mass of the piston and load is 195 kg. Good heat conduction through the wall. No friction. Remove the load (100 kg)  equilibrium state. Find: （1）Elevation of the piston, L （2）Work done by the gas, given Example #4 （3）Heat transfer Q     kJ/kg K u T  0.72