First slide

Heat engine

Question

A Carnot engine working between 300 K and 600 K has work output of 800 J per cycle. What is amount of heat energy supplied to the engine from source per cycle?

Moderate

A

1800 J/cycle
B

1000 J/cycle
C

2000 J/cycle
D

1600 J/cycle

Solution

$η = \frac{T_{1} - T_{2}}{T_{1}} - \frac{W}{Q} \Rightarrow Q = (\frac{T_{1}}{T_{1} - T_{2}}) W$
$= \frac{600}{(600 - 300)} \times 800 = 1600 J$

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