Air is cooled and dehumidified as it flows over the coils of a refrigeration system at 85 kPa from 30°C and a humidity ratio of 0.023 kg/kg dry air to 15°C and a humidity ratio of 0.015 kg/kg dry air. If the mass flow rate of dry air is 0.7 kg/s, the rate of heat removal from the air is
(a) 5 kJ/s (b) 10 kJ/s (c) 15 kJ/s
(d) 20 kJ/s (e) 25 kJ/s