Question

A certain engine extracts 1300 J of heat from a hot temperature reservoir and discharges 700 J of heat to a cold temperature reservoir. What is the efficiency of this engine?

Answer 1

Answer:

the efficiency of the heat engine is 46%

Explanation:

As we know that the heat extracted from engine is 1300 J

also we know that the heat discharged to the reservoir is 700 J

So we will find efficiency as

$\eta = 1 - \frac{Q_2}{Q_1}$

$\eta = 1 - \frac{700}{1300}$

so we have

$\eta = 0.46$

the efficiency of the heat engine is 46%