Home
Class 12
CHEMISTRY
The bond energies of H--H , Br--Br and H...

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

A

`-261kJ`

B

`+103kJ`

C

`+261kJ`

D

`-103kJ`d

Text Solution

Verified by Experts

The given reaction is:
`H-H(g)+Br-Br(g)to2H-Br(g)`
`DeltaH^(@)=sum(B.E.)_("Reactants")-sum(B.E.)_("products")`
`=[433+192]-[2xx364]`
`=-103kJ" "mol^(-1)`
Promotional Banner

Topper's Solved these Questions

  • Chemical Thermodynamics and Thermochemistry

    OP TANDON|Exercise Miscellaneous Numerical Examples|22 Videos

  • Chemical Thermodynamics and Thermochemistry

    OP TANDON|Exercise Practice problems|81 Videos

  • Chemical Thermodynamics and Thermochemistry

    OP TANDON|Exercise Solved Example|74 Videos

  • CHEMICAL KINETICS

    OP TANDON|Exercise LINKED COMPRESHENSION TYPE QUESTIONS ( SECTION-VI)|4 Videos

  • CLASSIFICATION AND NOMENCLATURE OF ORGANIC COMPOUNDS

    OP TANDON|Exercise INTEGER|2 Videos

Similar Questions

Explore conceptually related problems

If the end energies of H-H, Br-Br and H-Br are 433, 1992 and 364 kJ mol^(-1) respectively, then DeltaH^(@) for the reaction, H_(2)(g)+Br_(2)(g)to2HB r(g) is

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

It is possible to calculate the value of DeltaH for the reaction H_(2)(g) +Br_(2)(l) rarr 2HBr(g) from the bond enthalpy data alone.

At 1 atm will the Delta_(f)H^(@) be zero for CI_(2)(g) and Br_(2)(g) ? Explain.

k_(P) & k_(C) are ….. for reaction at equilibrium of type H_(2)(g) + Br_(2)(g) hArr 2HBr(g) .

OP TANDON-Chemical Thermodynamics and Thermochemistry-Illustrations of Objective Questions
  1. The enthalpy change for the following process are listed below: (a) ...

    Text Solution

    |

  2. Given that: 2C(s)+O(2)(g)to2CO(2)(g)" "(DeltaH=-787kJ) . . . (i) ...

    Text Solution

    |

  3. The bond energies of H--H , Br--Br and H--Br are 433,, 192 and 364KJmo...

    Text Solution

    |

  4. For liquid enthalpy of fusion is 1.435 kcal mol^(-1) and molar entropy...

    Text Solution

    |

  5. Latent heat of vaporisation of water is 540cal g^(-1) at 100^(@)C calc...

    Text Solution

    |

  6. Enthalpy of fusion of water is 6.01 kJ mol^(-1). The entropy change of...

    Text Solution

    |

  7. For spontaneous process:

    Text Solution

    |

  8. Melting point of a solid is x K and its latent heat of fusion is 600 c...

    Text Solution

    |

  9. The entropy change involved in the conversion of 1 mole of liquid wate...

    Text Solution

    |

  10. The free energy for a reaction having DeltaH=31400 cal, DeltaS=32" cal...

    Text Solution

    |

  11. F(2)C=CF-CF = CF(2) rarr F(2)underset(FC=)underset(|)(C)-underset(CF)u...

    Text Solution

    |

  12. For the equilibrium reaction, the value of Gibbs free energy change is...

    Text Solution

    |

  13. At 0^(@)C ice and water are in equilibrium and DeltaH=6kJ" "mol^(-1) f...

    Text Solution

    |

  14. For a reaction, Ag(2)O(s)hArr2Ag(s)+(1)/(2)O(2)(g) DeltaH,DeltaS a...

    Text Solution

    |

  15. For the homogeneous reactions: xA+yBtolY+mZ DeltaH=-30kJ" "mol^(-1...

    Text Solution

    |

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

    Text Solution

    |

  17. For a reaction DeltaH=+29kJ" "mol^(-1),DeltaS=-35KJ^(-1)" "mol^(-1) ...

    Text Solution

    |

  18. What is DeltaG^(@) for the reaction? (1)/(2)N(2)(g)+(3)/(2)H(2)(g) ...

    Text Solution

    |

  19. What is the sign of DeltaG^(Theta) and the values of K for an electroc...

    Text Solution

    |

  20. The free energy of formation of NO is 78 kJ mol^(-1) at the temperatur...

    Text Solution

    |