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Standard XII

Physics

Heat Engines

An ideal gas ...

Question

An ideal gas acting as a working substance for a heat engine. The heat interaction involved during the process are $Q_{1} = 9605 J$ and $Q_{2} = - 8565 J$ respectively. Then efficiency of the heat engine is

10.82 %

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79.18 %

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60 %

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21 %

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Solution

The correct option is A $10.82 %$
Here $Q_{1} = + 9605 J$ , hence it represents the heat absorbed by working substance.
$Q_{2} = - 8565 J$ , hence it represents the heat rejected to sink by working substance.
Thermal efficiency of heat engine is given as,
$η = (1 - \frac{Q_{2}}{Q_{1}}) \times 100$
$η = (1 - \frac{8565}{9605}) \times 100$
$∴ η = 10.82 %$

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Similar questions

Q. An ideal gas acting as a working substance for a heat engine. The heat interaction involved during the process are

Q_{1} = 9605 J

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An ideal gas acting as a working substance for a heat engine. The heat interaction involved during the process are Q1=9605 J and Q2=−8565 J respectively. Then efficiency of the heat engine is

The correct option is A 10.82%Here Q1=+9605 J, hence it represents the heat absorbed by working substance. Q2=−8565 J, hence it represents the heat rejected to sink by working substance. Thermal efficiency of heat engine is given as, η=(1−Q2Q1)×100 η=(1−85659605)×100 ∴η=10.82%

An ideal gas acting as a working substance for a heat engine. The heat interaction involved during the process are $Q_{1} = 9605 J$ and $Q_{2} = - 8565 J$ respectively. Then efficiency of the heat engine is