Home
Class 11
PHYSICS
A refrigerator transfers heat from the c...

A refrigerator transfers heat from the cold coling coils to the warm surroundings. Is it against the second law of thermodynamics? Justify your answer?

Text Solution

Verified by Experts

No, External work is done.
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    CBSE COMPLEMENTARY MATERIAL|Exercise SHORT ANSWER TYPE QUESTIONS (2 MARKS)|11 Videos

  • THERMODYNAMICS

    CBSE COMPLEMENTARY MATERIAL|Exercise SHORT ANSWER TYPE QUESTIONS (3 MARKS)|10 Videos

  • ROTATIONAL MOTION

    CBSE COMPLEMENTARY MATERIAL|Exercise MULTIPLE CHOICE QUESTIONS|20 Videos

  • WORK, ENERGY AND POWER

    CBSE COMPLEMENTARY MATERIAL|Exercise MCQ|20 Videos

Similar Questions

Explore conceptually related problems

The second law of thermodynamics deals with transfer of

Asssertion: It is not possible for a system, unaided by an external agency to transfer heat from a body at lower temp. to another at a higher temp. Reason: It is not possible to violate the second law of thermodynamics.

An ideal refrigerator is used to transfer heat from a freezer at -23^@C to the surrounding at 27^@C . Its coefficient of performance is

In a refrigerator one removes heat from a lower temperature and deposits to the surroundings at a higher temperature. In this process, mechanical work has to be done, which is provided by an electric motor. If the motor is of 1kW power and heat transferred from -3^(@) C to 27^(@) C, find the heat taken out of the refrigerator per second assuming its efficiency is 50% of a perfect engine.

When an object cools down, heat is withdrawn from it. Does the entrophy of the object decrease in this process? If yes, is it a violation of the second law of thermodynamics stated in terms of increased in entrophy?

What energy percentage can be captured by the organisms of next trophic level or transfer of energy from one trophic level is according to second law of thermodynamics. The efficiency of energy transfer from herbivorous to carnivorous is

A refrigerator transfers 250 J heat per second from -23^(@)C to -25^(@)C . Find the power consumed , assuming no loss of energy.

In a refrigerator, one removes heat from a lower temperature and deposites to the surrounding at a higher temperature. In this process, machanical work has to be done, which is provided by an elecrtic motor. If the motor is of 1KV power, and heat is transferred from -3^(@)C "to" 27^(@)C , find the heat taken out of the refrigerator per second assuming its efficiency is 50% of a perfect engine.

" An ideal refrigerator is used to transfer heat from a freezer at "-23^(@)C" to the surroundings at "27^(7)C" .Its coefficient of performance is :- "

CBSE COMPLEMENTARY MATERIAL-THERMODYNAMICS -MULTIPLE CHOICE QUESTIONS (MCQs)
  1. A refrigerator transfers heat from the cold coling coils to the warm ...

    Text Solution

    |

  2. An ideal gas undergoes for different processes from the same initial s...

    Text Solution

    |

  3. An ideal gas undergoes cyclic process ACBC as shown is given PV diagra...

    Text Solution

    |

  4. Consider two containers A and B containing identical gases at the same...

    Text Solution

    |

  5. Which of the process described below are irrevesible?

    Text Solution

    |

  6. An ideal gas undergoes isothermal process from some initial state i to...

    Text Solution

    |

  7. (figure). Shows the P-V diagram of an ideal gas undergoing a change of...

    Text Solution

    |

  8. A monatomic gas at a pressure P, having a volume V expands isothermall...

    Text Solution

    |

  9. One mole of an ideal diatomic gas undergoes a transition from A to B a...

    Text Solution

    |

  10. At 27^@C two moles of an ideal monatomic gas occupy a volume V. The ga...

    Text Solution

    |

  11. In the above question, change in internal energy of gas is

    Text Solution

    |

  12. P-V plots for two gases during adiabatic processes are shown in the fi...

    Text Solution

    |

  13. The work of 146 kJ is performed in order to compress one kilo mole of ...

    Text Solution

    |

  14. In V-T diagram shown in fig., what is the relation between P1 and P2 ?

    Text Solution

    |

  15. The P-V diagram of a gas undergoing a cyclic process ABCDA is shown in...

    Text Solution

    |

  16. During an adiabatic process, the pressure of a gas is found to be prop...

    Text Solution

    |

  17. A body at a temperature of 727^(@)C and having surface area 5 cm^(2), ...

    Text Solution

    |

  18. In a Carnot engine when T(2) = 0^(@)C and T(1) = 200^(@)C its efficien...

    Text Solution

    |

  19. A Carnot engine, having an efficiency of eta=1//10 as heat engine, is ...

    Text Solution

    |

  20. The door of a running refrigerator inside a room is left open. The cor...

    Text Solution

    |

  21. If a piece of metal is heated to temperature theta and the allowed to ...

    Text Solution

    |