Question

calculate the efficiency of a heat engine working between 100degree celsius and 400 degree celsius . if it absorbs 200 joule per cycle from the source. calculate the heat rejected to the sink in one cycle​

Answer 1

Given

Source temperature T₁ = 400⁰ C = 400 +273 =673 K

Sink temperature T₂ = 100⁰ C = 100 +273 =373 K

Heat absorbed by the engine = 200 J

Considering the heat engine as reversible heat engine

Efficiency of heat engine η = (Q₁ -Q₂)/(Q₁) = (T₁ -T₂)/(T₁)

1 - (Q₂ / Q₁) = 1 - (T₂ / T₁)

Q₂ = (373 × 200)/673 = 110.84

Q₂ = 110.84 J