A vertical piston-cylinder arrangement contains air at 27C and is equipped with an electric resistor. The top of the piston experiences a pressure due to the atmosphere (Patm=100kPa). While the pressure of the air stays constant, an electric current passes through the resistor, resulting in a gradual increase in the air's volume from initial 1m3 to 1.2m3. The air specific internal energy increases by 20kJ/kg. Determine the heat transfer from the resistor to the air in kJ for the system consisting of the air shown in the figure. The piston has a mass of 25kg and a surface area of 1m2