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The efficiency of a heat engine is 20%, ...

The efficiency of a heat engine is `20%`, when the working substance is hydrogen. Its efficiency if hydrogen is replaced by oxygen is

A

`20%`

B

`40%`

C

`60%`

D

`80%`

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CHETANA PUBLICATION-Thermodynamics-EXERCISE
  1. Two engines A and B have their sources at 400 K and 350 K and sinks at...

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  2. If two thirds of the heat taken by a heat engine from the source is gi...

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  3. The efficiency of a heat engine is 20%, when the working substance is ...

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  4. If the absolute temperatures of the source and sink of a heat engine a...

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  5. Two Carnot engines A and B are operated in series. A receives heat at ...

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  6. A refrigerator has a coefficient of performance 9. If the surrounding ...

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  7. A refrigerator works between 0^@C and 27^@C. If heat is to be removed ...

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  8. A gas in a closed container is heated with 10 J of energy , causing t...

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  9. Which of the following is an example of the first law of thermodynamic...

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  10. Efficiency of a Carnot engine is large when

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  11. The second law of thermpdynamics deals with transfer of

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  12. During refrigration cycle, heat is rejected by the refrigerant in the

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  13. Select and write correct alternative from the following alternatives: ...

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  14. State first law of thermodynamics.

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  15. Work done during expansion is positive. Explain.

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  16. State zeroth law of thermo dynamics? OR Give the characteristics of is...

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  17. Draw a neat labelled diagram to show the energy flow of heat engine.

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  18. State both the statements of second law of thermodynamics.

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  19. Mention the set of processesin a Carnot cycle.

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  20. Distinguish between Reversible and Irreversible process.

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