Question: Air is to be heated steadily by an 8-kW electric resistance heater as it flows through an insulated duct. If the air enters at 50C

Air is to be heated steadily by an 8-kW electric resistance heater as it flows through an insulated duct. If the air enters at 50°C at a rate of 2 kg/s, the exit temperature of air is
(a) 46.0°C (d) 55.4°C
(b) 50.0°C (e) 58.0°C
(c) 54.0°C

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