Home
Class 12
CHEMISTRY
The standard heats of formation in Kcal ...

The standard heats of formation in Kcal `mol^(-1)` of `NO_(2)(g)` and `N_(2)O_(4)(g)` are 8.0 and 2.0 respectively. The heat of dimerization of `NO_(2)` in Kcal is. Given : `2NO_(2)(g)hArr N_(2)O_(4)(g)`

A

10

B

`- 6.0`

C

`- 12.0`

D

`- 14.0`

Text Solution

Verified by Experts

The correct Answer is:
D
`DeltaH_("reaction")=DeltaH_(f)^(@)(N_(2)O_(4))-2DeltaH_(f)^(@)(NO_(2))`
`=2-2(8)=-14 kcal`.
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS AND THERMOCHEMISTRY

    ERRORLESS |Exercise ORDINARY THINKING (Objective Questions) Bond energy|15 Videos

  • THERMODYNAMICS AND THERMOCHEMISTRY

    ERRORLESS |Exercise ORDINARY THINKING (Objective Questions) Free energy and Work function|57 Videos

  • THERMODYNAMICS AND THERMOCHEMISTRY

    ERRORLESS |Exercise ORDINARY THINKING (Objective Questions) First law of thermodynamics and Hess law|100 Videos

  • SOME BASIC CONCEPTS OF CHEMISTRY

    ERRORLESS |Exercise JEE Section (Matrix Match type questions)|3 Videos

Similar Questions

Explore conceptually related problems

The standard heat of formation of NO_(2)(g) and N_(2)O_(4)(g) are 8.0 and 4.0 kcal mol ^(-1) respectively. The heat of dimerisation of NO_(2) in kcal is

The standard heats of formation of NO_(2)(g) and N_(2)O_(4)(g) are 0.8 and 2.0 Kcal mol^(-1) respectively the heat of dimerization of NO_(2) in Kcal is

The stadard heats of formation of NO_(2)(g) and N_(2)O_(4) (g) are 33.5 and 8.4 kJ mol^(-1) respectively. The heat of dimerisation of NO_(2) in kJ is

Heat of formation of CO_(2)(g),H_(2)O(l)andCH_(4)(g)"are"-94,-68.4 and-17 .9 "kCal" " mol"^(-1) respectively, the heat of combustion of CH_(4)(g) is :-

The heat of formations of CO_((g)) and CO_(2(g)) are -26.4 kcal and -94.0 kcal respectively. The heat of combustion of carbon monoxide will be _________ .

ERRORLESS -THERMODYNAMICS AND THERMOCHEMISTRY -ORDINARY THINKING (Objective Questions) Heat of reaction
  1. What is the weight of oxygen required for the complete combustion of 2...

    Text Solution

    |

  2. For CaCO(3)(s)rarr CaO(s)+CO(2)(g) at 977^(@)C, Delta H = 174 KJ/mol ,...

    Text Solution

    |

  3. When 5 litres of a gas mixture of methane and propane is perfectly com...

    Text Solution

    |

  4. Given : (i) C("graphite") + O(2)(g) rarr CO(g) ,Delta(r )H^(@) = xkJ...

    Text Solution

    |

  5. What would be the heat released when an aqueous solution containing 0....

    Text Solution

    |

  6. Which of the following statement is correct

    Text Solution

    |

  7. Correct relationship between heat of fusion (DeltaH(fus)), heat of vap...

    Text Solution

    |

  8. Enthalpy change for reaction 1//2H(2)(g)+1//2Cl(2)(g)toHCl(g) is...

    Text Solution

    |

  9. The enthalpy of neutralization is about 57.3 kJ for the pair

    Text Solution

    |

  10. Heat of combustion of CH(4),C(2)H(6), C(2)H(4) and C(2)H(2) gases are ...

    Text Solution

    |

  11. Heat of formation of CO(2)(g),H(2)O(l)andCH(4)(g)"are"-94,-68.4 and-17...

    Text Solution

    |

  12. The heat change Delta H for the reaction 2 CO +O2to 2 CO2, Delta H=-...

    Text Solution

    |

  13. The heat of formation of H(2)O(l) is -68.0 kcal, the heat of formation...

    Text Solution

    |

  14. The heat of combustion of carbon is -94 kcal at 1 atm pressure. The in...

    Text Solution

    |

  15. The heat of combustion of benzene determined in a bomb calorimeter is ...

    Text Solution

    |

  16. The standard heats of formation in Kcal mol^(-1) of NO(2)(g) and N(2)O...

    Text Solution

    |

  17. Calculate the heat of combustion of benzene form the following data: ...

    Text Solution

    |

  18. Assertion:The enthalpies of neutralised of strong acids and strong bas...

    Text Solution

    |

  19. Assertion (A): The heat of neutralisation of perchloric acid, HCIO(4),...

    Text Solution

    |

  20. The bond dissociation energies ofX(2),Y(2)andXY are in the ratio of1:0...

    Text Solution

    |