Home
Class 12
PHYSICS
A Carnot engine takes 3xx10^6 cal of hea...

A Carnot engine takes `3xx10^6` cal of heat from a reservoir at `627^@C` and gives it to sink at `27^@C`. What is the work done by. the engine ?

A

(a) zero

B

(b) `16.8xx10^6J`

C

(c) `8.4xx10^6J`

D

(d) `4.2xx10^6J`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • THERMAL PROPERTIES OF MATTER (HEAT TRANSFER)

    MBD PUBLICATION|Exercise QUESTION BANK|217 Videos

  • VECTOR ANALYSIS

    MBD PUBLICATION|Exercise QUESTION BANK|250 Videos

Similar Questions

Explore conceptually related problems

A Carnot engine worked backwards absorbs 600 calories of heat fron a sink at 27^@C and rejects it to a source at 127^@C . Calculate how much energy is-transferred to the source.

A Carnot engine draws 500 cal of heat from a source at 500K and rejects 300 cal of heat to the sink. Calculate the temperature of the sink and the efficiency of the engine.

A Carnot engine is working between two temperature 327^@C and 227^@C , find its efficiency.

A Carnot engine has an efficiency of 30% when the temperature of sink is 56^@C . How should the temperature of source be increased if the engine efficiency is to be increased to 80% ?

300 cc of a gas are heated from 27^@C to 127^@ C . What will be the new volume at constant pressure ?

A Carnot engine working in a cycle absorbs 10^4 calories. If the temperature of the source and the sink are 327^@C and 27^@C respectively, calculate the heat rejected to the sink.

MBD PUBLICATION-THERMODYNAMICS-QUESTION BANK
  1. The work done during expansion of a gas in vacuum is zero, because the...

    Text Solution

    |

  2. An ideal gas is enclosed in a closed, rigid and thermally insulated co...

    Text Solution

    |

  3. A Carnot engine takes 3xx10^6 cal of heat from a reservoir at 627^@C a...

    Text Solution

    |

  4. The source of temperature of a carnot engine is 127^@C.It takes 500 ca...

    Text Solution

    |

  5. A Camot engine working between450 K and 600 K has a work output of 300...

    Text Solution

    |

  6. The temperature of the sink of a carnot engine is 27^@C The efficiency...

    Text Solution

    |

  7. For which of the following combinations of working temperatures, the e...

    Text Solution

    |

  8. A carnot engine has the same efficiency between 800 K and 500 K and x ...

    Text Solution

    |

  9. Which statement is incorrect ?

    Text Solution

    |

  10. Even carnot engine cannot give 100% efficiency because we cannot

    Text Solution

    |

  11. The power of a carnot engine is

    Text Solution

    |

  12. An ideal carnot engine, whose efficiency is 40%, receives heat from th...

    Text Solution

    |

  13. The efficiency of an ideal heat engine can be100% if the sink (exhaust...

    Text Solution

    |

  14. A carnot engine has the same efficiency between 100 K and 500 K and T ...

    Text Solution

    |

  15. A carnot engine first works between 100^@C and 0^@C and then between 0...

    Text Solution

    |

  16. A carnot engine takes in heat from a reservoir of heat at 427^@C and g...

    Text Solution

    |

  17. In the carnot engine, heat Q1 is absorbed from the source at temperatu...

    Text Solution

    |

  18. The temperatures of the source and the sink of a heat engine are 127^@...

    Text Solution

    |

  19. Ina Carnot engine, the temperature of the reservoir is 927^@C and that...

    Text Solution

    |

  20. In an ideal refrigerator, heat from inside at 280 K is transferred to ...

    Text Solution

    |