Two moles of an ideals gas at 500k and 10 atm pressure are contained in an insulated piston-cylinder arrangement. The gas is allowed to expand reversibly and adiabatecally. During the expansion, gas at a temperature equal to the current instantaneous temperatures of the gas in the cylinder is added through an inlet vavle in sufficient quantity to maintain the internal pressure constant at 10 atm throughout the expansion. When the total work done equals -50L atm, the expansion is halted. Calculate the final temperature of the gas inside the piston and determine the number ofm oles of gas present after expansion is complete. You may assume the molar heat capacity is constant at 1.5R