Home
Class 11
CHEMISTRY
Given the bond energies N=N , H and H-H ...

Given the bond energies `N=N` , `H` and `H-H` bond are `945, 436` and `391KJmol^(-1)` respectively, the enthalpy change of the reaction
`N_(2)(g)+3H_(2)(g)rarr2NH_(3)(g)` is

A

-`93KJ`

B

`102KJ`

C

`90KJ`

D

`105KJ`

Text Solution

Verified by Experts

The correct Answer is:
A
`DeltaH=(945+3xx439)-(2xx3xx391)`
`=2253-2346`
`=-93KJ`
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL THERMODYNAMICS

    A2Z|Exercise Entropy, Gibb'S Energy And Spontaneity Of Process|52 Videos

  • CHEMICAL THERMODYNAMICS

    A2Z|Exercise Heat Capacity And Calorimetry|13 Videos

  • CHEMICAL THERMODYNAMICS

    A2Z|Exercise Section D - Chapter End Test|30 Videos

  • CHEMICAL EQUILIBRIUM

    A2Z|Exercise Section D - Chapter End Test|30 Videos

  • CLASSIFICATION OF ELEMENTS AND PERIODICITY OF PROPERTIES

    A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

Given the bond energirs N=N,H-H and N-H bonds are 945,436 and 391KJmol^(-1) respectively, the enthalpy of the follwing reactlon N_(2)(g)+3H_(2)(g)rarr2NH_(3)(g) is

For the reaction, N_(2)(g)+3H_(2)(g) to 2NH_(3)(g)

The bond energies of H--H , Br--Br and H--Br are 433,, 192 and 364KJmol^(-1) respectively. The DeltaH^(@) for the reaction H_(2)(g)+Br_(2)(g)rarr2HBr(g) is

The bond enthalpy of C - C, C = C, H - H and C - H bonds are 350,600,400 and 410 kJ · mol-1 respectively. The enthalpy change for reaction C_(2)H_(4(g)) +H_(2(g)) rarr C_(2)H_(6(g)) is

The standard enthyalpy of N_(2(g))+3H_(2(g)rarr2NH_(3(g)) is

A2Z-CHEMICAL THERMODYNAMICS-Work, Internal Energy And Enthalpy
  1. Heat of hydrogenation of ethene is x(1) and that of benzene is x(2) . ...

    Text Solution

    |

  2. Under the same conditions, how many mL of 1M KOH and 0.5M H(2)SO(4)sol...

    Text Solution

    |

  3. Bond energy of (N-H) bond is yKJ mol^(-1) under standard state. Thus,c...

    Text Solution

    |

  4. The enthaplpy changes state for the following processes are listed bel...

    Text Solution

    |

  5. For the equations C1 ("diamond") +2H(2)(g)rarrCH(4)(g),DeltaH(1) C...

    Text Solution

    |

  6. If H(2)(g)=2H(g),DeltaH=104cal , then heat of atomisation of hydrogen ...

    Text Solution

    |

  7. The average Xe-F bond energy is 34Kcal//mol , first I.E. Of Xe is 279K...

    Text Solution

    |

  8. The standard enthalpy of formation of NH(3) is -46.0KJ mol^(-1) . If t...

    Text Solution

    |

  9. Given H(2)(g)=2H(g)Delta(H-H)=103Kcal mol^(-1) The heat of reaction ...

    Text Solution

    |

  10. Energy required to dissociate 4g of gaseous hydrogen into free gaseous...

    Text Solution

    |

  11. The H-H bond energy is 430KJ mol^(-1) and Cl-Cl bonds is 240KJ mol^(-1...

    Text Solution

    |

  12. Given the bond energies N=N , H and H-H bond are 945, 436 and 391KJmol...

    Text Solution

    |

  13. AB , A(2) and B(2) are diatomic molecules, if the bond enthalpies of A...

    Text Solution

    |

  14. The standard enthalpies of formation of SF(6)(g) , S(g) and F(g) are -...

    Text Solution

    |

  15. Using bond enthalpies (symbolized by epsilon) an estimated value of De...

    Text Solution

    |

  16. The heat of formation of CO(2) is -407KJ//mol . The energy required fo...

    Text Solution

    |

  17. Heat evolved in the reaction H(2)+Cl(2) rarr 2HCl is 182 kJ Bond ene...

    Text Solution

    |

  18. Enthalpy of formation of 2mol of NH(3)(g) is -90KJ , and DeltaH(H-H) a...

    Text Solution

    |

  19. Oxidising power of chlorine in aqueous solution can be determined by t...

    Text Solution

    |

  20. The value of DeltaH(O-H) is 109Kcal//mol . The enthalpy of formation o...

    Text Solution

    |