1. The problem statement, all variables and given/known data a mass of 15kg of air in piston-cylinder assembly is heated from 25°C to 77°C by passing current through a resistance heater inside the cylinder. the pressure inside the cylinder held constant at 300kPa during the process and heat loss of 60kJ occurs. (Cv= 0.718 kJ/kgK) i) find the electrical energy supplied in kJ and kWhr 2. Relevant equations 3. The attempt at a solution W-60k = 15 (0.718)(52) W= 620.04kJ so to find the energy in kWhr, take 620.04 /3600? is it correct?