Home
Class 12
CHEMISTRY
The enthalpy of vaporisation of liquid w...

The enthalpy of vaporisation of liquid water using the data
`H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(l)` , `DeltaH=-285.77 kJ//mol`
`H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(g)`, `DeltaH=-241.84 kJ//mol`

A

`+43.93 kJ//"mole"`

B

`-43.93 kJ//"mole"`

C

`+527.61 kJ`

D

`-527.61 kJ`

Text Solution

Verified by Experts

The correct Answer is:
A
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 vapourisation of liquid water using the data : H_(2)(g)+1//2O_(2)(g)rarr H_(2)O(l) , Delta =-285.77 KJ mol^(-1) H_(2)(g)+1//2O_(2)(g)rarr H_(2)O(g) , Delta H=-241.84 KJ mol^(-1)

H_(2)(g)+(1)/(2)O_(2)(g)rarr2H_(2)O(l), DeltaH =- 286 kJ 2H_(2)(g)+O_(2)(g)rarr2H_(2)O(l)……………kJ(+-?)

H_(2)O(g)+(1)/(2)O_(2)(g)toH_(2)O(g)," "DeltaH=x H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(l)," "DeltaH=y heat of vaporization of water is:

DINESH PUBLICATION-CHEMICAL THERMODYNAMICS AND CHEMICAL ENERGETICS -Exercise
  1. Which of the following equations does not correctly represent the firs...

    Text Solution

    |

  2. For the reaction CO (g) + (1)/(2) O(2) (g) rarr CO(2) (g) Delta H ...

    Text Solution

    |

  3. The enthalpy of vaporisation of liquid water using the data H(2)(g)+...

    Text Solution

    |

  4. The enthalpy of certain reaction at 273 K is -20.75 kJ. The enthalpy o...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  9. A process is spantaneous at a given temperature if

    Text Solution

    |

  10. Enthalpy is equal to

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  16. For an ideal gas expanding adiabatically in vacuum,

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  20. 4.48 L of an ideal gas at STP requires 12 cal to raise its temperature...

    Text Solution

    |