Question

A steam engine delivers 4.8 x 10⁸ Jof work per minute and services 1.2 x 10⁹ J of heat per minute from its boiler. What is the percentage efficiency of the engine?

Answer 1

Given:
W = 4 .8 x 10⁸ J , Q_H = 1.2 x 10⁹ J

To find:

Efficiency (Tη) = ?

Formula:

From formula,

`η = (4.8 xx10^8)/(1.2 xx 10^9) = 0.4`

∴ Percentage = 0.4 x 100 = 40%

The percentage efficiency of the steam engine is 40%.