Five kilograms of air are used in a Carnot heat pump cycle with a coefficient of performance of 6.0. The system cycles 3 times per minute delivering heat to a 27 ?C room. The air receives 300 kJ of work on the 5 kg of air during the isothermal compression step, bringing it to 10 bar. Assume the air behaves ideally. (a) What is the temperature of the other thermal reservoir? (b) At which temperature does the isothermal compression occur: hot or cold (c) What is the pressure at the beginning of the isothermal compression? (d) What is the work of the adiabatic compression step? (e) At what rate does heat enter the heat pump?