Problem 4: Anideal gas is contained in a piston-cylinder assembly. The pressure of the gas is initially balanced by two 2000 kg blocks plus the atmospheric pressure of 1 bar. The piston has a cross- sectional area of 0098 m? and is initially 0.2 m from the base of the cylinder. The gas is allowed to expand in the two-step isothermal expansion process drawn in the following figure. One 2000 kg block is removed. The gas expands until the pressures are equal. The next blocks is then removed and the gas expands until it reaches a pressure of 1 bar. The temperature in the system remains at 300 K throughout the process. The surroundings are at a temperature off 300 Kand a pressure of 1 bar. The heat capacity is given by: (Ans: 3.3 kJ /mol) Cp = =36+ (05x107%)T Where T is in Kelvin. Determine the work obtained during this process. Py =1 [bar] To =300 [K] Process: Process: Isothermal Isothermal Expansion Expansion _r A =0.098 m? Pure, ideal gas 0.2m Initial State Intermediate State Final State