First slide

Heat Engine; Carnot Engine and refrigerator

Question

A Carnot engine has the same efficiency between 800K to 500K and xk to 600K. The value of x is

Moderate

A

960K
B

1000K
C

754K
D

846K

Solution

$η = \frac{1 - T_{2}}{T_{1}}$
$\begin{array}{l} η_{1} = η_{2} \\ 1 - \frac{500}{800} = 1 - \frac{600}{x} \\ x = 960 k \end{array}$

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