Home
Class 12
CHEMISTRY
Given that DeltaH(f) (H) = 218 KJ//mol, ...

Given that `DeltaH_(f) (H) = 218 KJ//mol`, express the H-H bond energy in Kcal//mol.

A

52.15

B

911

C

104

D

52153

Text Solution

Verified by Experts

The correct Answer is:
( c)
`DeltaH_(f)(H)=218KJ//mol`
`(1)/(2) H_(2)to HrArrDeltaH=218KJ//mol`
`H_(2) toH RightarrowDeltaH=436KJ//mol`
=`436xx(1)/(4.18)kcal//mol(because1KJ=(1)/(4.18)kcal)`
`104.306 kcal//mol`
Hence, H - H bond energy is `104.306 Kcal//mol`
Promotional Banner

Topper's Solved these Questions

  • BIOMOLECULES

    SIA PUBLICATION|Exercise MCQ.s|10 Videos

  • CHEMICAL EQUILIBRIUM AND ACIDES-BASES

    SIA PUBLICATION|Exercise MCQ|77 Videos

Similar Questions

Explore conceptually related problems

Consider the following data: Delta_(f) H^(2) (N_(2)H_(4), l) =50kJ//mol,, Delta_(f) H^(@) (NH_(3), g)=-46 kJ//mol , B.E. (N-H)= 393kJ//mol and B.E. (H-H)= 436 kJ/mol, also Delta_("vap") H (N_(2)H_(4),l)= 18kJ//mol . The N-N bond energy in N_(2)H_(4) is

The electron gain enthalpy Delta e_(g)H is -349 kJ mol^(-1) . If the ground state energy of Cl(g) is x kJ mol^(-1) . The ground state energy (in kJ mol^(-1) ) of Cl^(-) (g) is

Calculate the resonance energy of N_(2)O from the following data Delta H_(f) " of " N_(2)O= 82 kJ mol^(-1) . Bond energies of N -= N, N = N, O = O and N = O bond are 946, 418 and 607 kJ mol^(-1) respectively

Consider the following reaction : CO_((g)) + 2H_(2(g)) hArr CH_(3)OH_((g)) Given : Delta_(r) H^(@) (CH_(3)OOH, g) = -201 kJ/mol, Delta_(r) H^(@) (CO, g) = -114 kJ/mol S^(@) (CH_(3)OOH, g) = 240 J/K-mol , S^(@) (H_(2), g) = 29 JK^(-1)mol^(-1) S^(@) (CO, g) = 198 J/mol-K , C^(@)_(p,m) (H_(2)) = 28.8 J/mol-K C^(@)_(p,m) (CO) = 29.4 J/mol-K , C^(@)_(p,m) (CH_(3)OH) = 44 J/mol-K and ln ((320)/(300)) = 0.06 , all data at 300 K Delta_(r) H^(@) at 300 K for the reaction is :

Consider the following reaction : CO_((g)) + 2H_(2(g)) hArr CH_(3)OH_((g)) Given : Delta_(r) H^(@) (CH_(3)OOH, g) = -201 kJ/mol, Delta_(r) H^(@) (CO, g) = -114 kJ/mol S^(@) (CH_(3)OOH, g) = 240 J/K-mol , S^(@) (H_(2), g) = 29 JK^(-1)mol^(-1) S^(@) (CO, g) = 198 J/mol-K , C^(@)_(p,m) (H_(2)) = 28.8 J/mol-K C^(@)_(p,m) (CO) = 29.4 J/mol-K , C^(@)_(p,m) (CH_(3)OH) = 44 J/mol-K and ln ((320)/(300)) = 0.06 , all data at 300 K Delta_(r) S^(@) at 300 K for the reaction is :

Consider the following reaction : CO_((g)) + 2H_(2(g)) hArr CH_(3)OH_((g)) Given : Delta_(r) H^(@) (CH_(3)OH, g) = -201 kJ/mol, Delta_(r) H^(@) (CO, g) = -114 kJ/mol S^(@) (CH_(3)OOH, g) = 240 J/K-mol , S^(@) (H_(2), g) = 29 JK^(-1)mol^(-1) S^(@) (CO, g) = 198 J/mol-K , C^(@)_(p,m) (H_(2)) = 28.8 J/mol-K C^(@)_(p,m) (CO) = 29.4 J/mol-K , C^(@)_(p,m) (CH_(3)OH) = 44 J/mol-K and ln ((320)/(300)) = 0.06 , all data at 300 K Delta_(r) S^(@) at 320 K is :

Heats of atomisation of chlorine and hydrogen are 243 kJ mol^(-1) and 435 kJ mol^(-1) respectively. Heat of formation of HCl is -92 kJ mol^(-1) . Calculate the bond energy of HCL.

SIA PUBLICATION-CHEMICAL BONDING AND STRUCTURE OF MOLECULES-MCQ
  1. In which of the following pairs, the central atoms have the same numbe...

    Text Solution

    |

  2. Match the following

    Text Solution

    |

  3. Given that DeltaH(f) (H) = 218 KJ//mol, express the H-H bond energy in...

    Text Solution

    |

  4. Fluorine reacts with dilute NaOH and forms a gaseous product A. The bo...

    Text Solution

    |

  5. Dipole moment of HCl = 1.03 D, HI-0.38 D. Bond length of HCI-1.3 A^(@)...

    Text Solution

    |

  6. The bond length of HCl molecule is 1.275 A^(@) and its dipole moment i...

    Text Solution

    |

  7. Which one of the following is a correct set?

    Text Solution

    |

  8. The compound in which the number of dit - px bonds are equal to those ...

    Text Solution

    |

  9. Which of the following statements is correct?

    Text Solution

    |

  10. Which of the following is not a tetrahedral molecule?

    Text Solution

    |

  11. Which of the following is a linear molecule ?

    Text Solution

    |

  12. Which of the following is correct?

    Text Solution

    |

  13. Which of the following is not correct regarding the properties of ioni...

    Text Solution

    |

  14. The oxidation state of Xe in XeO(3) and the bond angle in it respectiv...

    Text Solution

    |

  15. If the bond length and dipole moment of a diatomic molecule are 1.25 A...

    Text Solution

    |

  16. Which one of the following molecules contains both ionic and covalent ...

    Text Solution

    |

  17. What is the hybridisation state of the central atom in NH(4)^(+) ion?

    Text Solution

    |

  18. The number of lone pairs of electrons present on Xe in XeF(4) is

    Text Solution

    |

  19. Which of the following statements is true ?

    Text Solution

    |

  20. Which of the following has lowest bond angle?

    Text Solution

    |