Question

A reversible Heat Engine operates between two reservoirs at temperatures of 673 K & 293 K. Its efficiency is?

Answer 1

Given :

Temperature of source = 673K

Temperature of sink = 293K

To Find :

Efficiency of the heat engine.

Solution :

❒ Efficiency of a heat engine is given by

• η = 1 - T₂ / T₁

» η denotes efficiency

» T₂ denotes temp. of sink

» T₁ denotes temp. of source

By substituting the given values;

➙ η = 1 - T₂ / T₁

➙ η = 1 - 293 / 673

➙ η = 1 - 0.44

➙ η = 0.565

Knowledge BoosteR :

The efficiency of heat engine :

• depends upon the temperature of the source and the sink$.$
• is independent of the nature of the working substance.
• is the same for all reversible engines working between the same two temperature.
• is directly proportional to the temperature difference (T₁ - T₂)
• is always less than 100%