Home
Class 12
CHEMISTRY
Water is supercooled to - 4^(@)C. The en...

Water is supercooled to `- 4^(@)C`. The enthalpy `(H)` is

A

same as ice at `-4^(@)C`

B

more than ice at `-4^(@)C`

C

same as ice at `0^(@)C`

D

less than ice at `-4^(@)C`

Text Solution

Verified by Experts

The correct Answer is:
D
When ice is supercooled to `-4^(@)C`, heat is released, so enthalpy decreases.
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL KINETICS

    DINESH PUBLICATION|Exercise Additional Numerical Problems For Practice|16 Videos

  • CHEMISTRY IN EVERY DAY LIFE

    DINESH PUBLICATION|Exercise Unit test-9|50 Videos

Similar Questions

Explore conceptually related problems

The enthalpy of formation of methane C_(( S))+2H_(2(g)) rarr CH_4(g) at constant pressure is 18500 cal at 25^@ C. The enthalpy of reaction at constant volume would be

The enthalpy of neutralization of oxitic acid by strong acid is 25.4 kcal mol^(-1) . The enthalpy of neutralization of strong acid and strong base is -13.7 kcal equil^(-1) . The enthalpy of dissociation of H_(2)C_(2)O_(4)hArr2H^(+)+C_(@)O_(4)^(2-) is

DINESH PUBLICATION-CHEMICAL THERMODYNAMICS AND CHEMICAL ENERGETICS -Exercise
  1. The enthalpy of certain reaction at 273 K is -20.75 kJ. The enthalpy o...

    Text Solution

    |

  2. The bond energies of C=C and C-C at 298 K are 590 and 331 kJ mol^(-1),...

    Text Solution

    |

  3. Water is supercooled to - 4^(@)C. The enthalpy (H) is

    Text Solution

    |

  4. When 0.1 mol of a gas absorbs 41.75 J of heat at constant volume, the ...

    Text Solution

    |

  5. If 150 kJ of energy is needed for muscular work to walk a distance of ...

    Text Solution

    |

  6. A process is spantaneous at a given temperature if

    Text Solution

    |

  7. Enthalpy is equal to

    Text Solution

    |

  8. Which one of the following sets of units represents the smallest and t...

    Text Solution

    |

  9. If K lt 1 then the value of Delta G^(@) will be

    Text Solution

    |

  10. During isothermal expansion of an ideal gas, its:

    Text Solution

    |

  11. For a reaction A+2BtoC+D, if DeltaH=-25kcal, T=300 K and DeltaS=90 cal...

    Text Solution

    |

  12. Delta G^(@) for a reaction is 46.06 kcal mol^(-). K(P) for the reactio...

    Text Solution

    |

  13. For an ideal gas expanding adiabatically in vacuum,

    Text Solution

    |

  14. How many calories are required to heat 40 g of argon from 40^(@)C to 1...

    Text Solution

    |

  15. If one mole of ammonia and one mole of hydrogen chloride are mixed in ...

    Text Solution

    |

  16. If an endothermic reaction occurs spontaneously at constant T and P, t...

    Text Solution

    |

  17. 4.48 L of an ideal gas at STP requires 12 cal to raise its temperature...

    Text Solution

    |

  18. Change in internal energy when 4 kJ of work is done on the system and ...

    Text Solution

    |

  19. Which of the ions in the table below would have the largest value of e...

    Text Solution

    |

  20. A piece of ice kept at room temperature melts of its own. This reactio...

    Text Solution

    |