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A furnace can supply heat steadily at 1200 K at a rate of 24000 kJ/min. The maximum amount of power (in kW) that can be produced by using the heat supplied by this furnace in an environment at 300 K is

1. 300
2. 150
3. 18000
4. 0

Correct answer: 300

Solution

The maximum power output can be calculated using the Carnot efficiency formula, which is based on the temperatures of the heat source and sink. The efficiency is given by 1 - (T_sink/T_source), and when applied to the given temperatures, it results in a maximum power output of 300 kW.

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