First slide

Heat engine

Question

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

Moderate

A

100 K
B

960 K
C

846 K
D

754 K

Solution

$\begin{array}{l} η_{1} = n_{2} \\ 1 - \frac{500}{800} = 1 - \frac{600}{x} \\ \Rightarrow x = \frac{800 \times 600}{500} = 960 K \end{array}$

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