Home
Class 12
CHEMISTRY
The enthalpies of formation of N(2)O and...

The enthalpies of formation of `N_(2)O` and `NO` are respectively `82` and `90 kJ mol^(-1)`. The enthalpy of reaction
`2N_(2)O(g)+O_(2)(g)to4NO(g)` is

A

8 kJ

B

88 kJ

C

`-16 kJ`

D

`196 kJ`.

Text Solution

Verified by Experts

The correct Answer is:
D
`Delta H = 4 Delta_f H^@(NO) -[2 xx Delta_f H^@(N_2O)+Delta_fH^@(O_2)]`
`=[4xx 90]-[2 xx 82+0]`
`= 360 -164 =196 kJ.`
Promotional Banner

Topper's Solved these Questions

  • Chemical Thermodynamics & Energetics

    NIKITA PUBLICATION|Exercise QUESTION FROM COMPETITIVE EXAM|35 Videos

  • CHEMICAL KINETICS

    NIKITA PUBLICATION|Exercise MCQs|351 Videos

  • CHEMISTRY IN EVERYDAY LIFE

    NIKITA PUBLICATION|Exercise MCQs|224 Videos

Similar Questions

Explore conceptually related problems

The enthapies of formation of N_2O and NO are 28 and 90 kj mol^(-1) respectively. The enthalpy of the reaction, 2N_2O(g)+O_2(g) rarr 4NO(g) is equal to

The enthalpies of formation of CO_(2(g)), H_(2)O_((l)) and C_(2)H_(4(g)) are respectively -393.5, -286 and +52.3 kJ mol^(-1) the enthalpy change for the combustion of C_(2)H_(4(g)) is

The enthalpy of formation of ammonia is -46.0 kJ mol^(-1) . The enthalpy for the reaction 2N_(2)(g)+6H_(2)(g)to4NH_(3)(g)

The enthalpy of formation of ammonia is -46.0 KJ mol^(-1) . The enthalpy change for the reaction 2NH_(3)(g)rarr N_(2)(g)+3H_(2)(g) is :

The enthalpy of formation of ammonia is -46.0 kJ mol^(-1) .The enthalpy for reaction 2N_2(g)+6H_2(g) rarr 4 NH_3(g) is equal to

The enthalpy of the reaction H_(2)O_(2) ("?") to H_(2) O ("?") + 1//2 O_(2) (g) is -23.5 kcal mol^(-1) and the enthalpy of formation of H_(2) O (?) is -68.3 kcal mol^(-1) . The enthalpy of formation of H_(2) O_(2) (?) is -

The enthalpy of formation of Fe_(2)O_(3)(s) is -824.2 kJ "mol"^(-1) .Calculate the enthalpy change for the reaction : 4Fe(s) + 3O_(2)(g) to 2Fe_(2)O_(3)(s)

NIKITA PUBLICATION-Chemical Thermodynamics & Energetics-QUESTION FROM COMPETITIVE EXAM
  1. The enthalpies of formation of N(2)O and NO are respectively 82 and 90...

    Text Solution

    |

  2. For an endothermic reaction where DeltaH represent the enthalpy of rea...

    Text Solution

    |

  3. Standard entropy of X(2) , Y(2) and XY(3) are 60, 40 and 50JK^(-1)mol...

    Text Solution

    |

  4. Match List I (Equations) with List II (Type of processes) and select t...

    Text Solution

    |

  5. Three moles of an ideal gas expanded spontaneously into vacuum. The wo...

    Text Solution

    |

  6. For vaporization of water at 1 atmospheric pressure the values of Delt...

    Text Solution

    |

  7. The following two reactionas are known FeO(3)(s)+3CO(g)rarr2Fe(s)+CO...

    Text Solution

    |

  8. If the enthaply change for the transition of liquid water to steam is...

    Text Solution

    |

  9. Enthalpy change for the reaction, 4H((g))rarr 2H(2(g)) is -869.6 kJ ...

    Text Solution

    |

  10. Consider the following processes :- {:(,DeltaH(kJ//mol)),((1)/(2)A r...

    Text Solution

    |

  11. In view of the signs of Delta(r)G^(0) for the following reactions Pb...

    Text Solution

    |

  12. The value of enthalpy change (DeltaH) for the reaction C(2)H(5)OH (l...

    Text Solution

    |

  13. Consider the reaction, 4NO(2)(g)+O(2)(g)rarr2N(2)O(5)(g),Delta(r )H=...

    Text Solution

    |

  14. Match the transformation in colums I with appropriate options in colum...

    Text Solution

    |

  15. The entropy change involved in the isothermal reversible expansion of ...

    Text Solution

    |

  16. Which of the following is correct option for the free expansion of an ...

    Text Solution

    |

  17. The Gibbs energy for the decomposition of Al(2)O(3) at 500^(@)C is as...

    Text Solution

    |

  18. The entropy change involved in the isothermal reversible expansion of ...

    Text Solution

    |

  19. The incorrect expression among the following is

    Text Solution

    |

  20. In which of the following reactions,standard reaction entropy change(D...

    Text Solution

    |

  21. The enthalpy of fusion of water is 1.435 kcal//"mole". The molar entro...

    Text Solution

    |