Home
Class 12
PHYSICS
A carnot engine takes in heat from a res...

A carnot engine takes in heat from a reservoir of heat at `427^@C` and gives out heat to the sink at `77^@C`. how many calorie per second must it take from the reservoir in- order to produce useful mechanical work at the rate of 357 W ?

A

`150cal//s`

B

`160cal//s`

C

`170cal//s`

D

`180cal//s`

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 locomotive engine operates between a boiler temperature of 100^@C and an outside temperature of 40^@C . Calculate the maximum fraction of heat from the boiler that can be transformed into mechanical work.

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.

An ideal heat engine operates between 177^@C and 27^@C If this engine takes 5xx10^5 Joule of heat from the source, how much work does it perform?

A reversible Carnot engine working between two temperatures converts 1/6 th of the heat supplied into useful work. If the lower temperature is reduced by 65^@C , its efficiency is double. Find the temperatures of source and sink.

MBD PUBLICATION-THERMODYNAMICS-QUESTION BANK
  1. A carnot engine has the same efficiency between 100 K and 500 K and T ...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  8. The inside and outside temperatures of a refrigerator are 273 K and 30...

    Text Solution

    |

  9. The temperature of a refrigerator is kept at7^@C to keep the food arti...

    Text Solution

    |

  10. A refrigerator abstracts 1600 calories of heat from the ice trays. The...

    Text Solution

    |

  11. A carnot engine has an efficiency of 20%. The energy is supplied to th...

    Text Solution

    |

  12. For a carnot engine the source and the sink temperatures are 527^@C an...

    Text Solution

    |

  13. A carnot engine operates between 227^@C and 127^@C. It absorbs 80 kilo...

    Text Solution

    |

  14. The efficiency of a heat engine is 50% and the temperature of the sink...

    Text Solution

    |

  15. A carnot engine whose sink is at 300^@ K has an efficiency of 40%. By ...

    Text Solution

    |

  16. What is the least amount of work that must be done to freeze ten gram ...

    Text Solution

    |

  17. The efficiency of a heat engine is eta and the coefficient of performa...

    Text Solution

    |

  18. A carnot engine, having an efficiency eta=1/10as heat engine, is used ...

    Text Solution

    |

  19. One gm of water at 373 K is converted into steam at the same temperatu...

    Text Solution

    |

  20. Calculate the change in internal energy when 0.15 kg of air heated fro...

    Text Solution

    |