An air handler is a large unmixed heat exchanger used for comfort control in large buildings. In one such application, chilled water (cp = 4.2 kJ/kg•K) enters an air handler at 5oC and leaves at 12oC with a flow rate of 1000 kg/hr. This cold water cools air (cp = 1.0 kJ/kg•K) from 25oC to 15oC. The rate of heat transfer between the two streams is
(a) 8.2 kW
(b) 23.7 kW
(c) 33.8 kW
(d) 44.8 kW
(e) 52.8 kW
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