Home
Class 10
CHEMISTRY
Energy required to dissociate 4 g of gas...

Energy required to dissociate 4 g of gaseous hydrogen into free gaseous atom is 208 Kcal at `25^(@)C`. The bond energy of H-H bond will be

A

1.04 Kcal

B

10.4 Kcal

C

104 Kcal

D

1040 Kcal

Text Solution

Verified by Experts

The correct Answer is:
A
`H_(2)(g) to 2H(g), Delta H = 104`
`n_(H_(2)(g)) = (4)/(2) = 2` mole.
`therefore " " Delta H_("Dissociation") = (208)/(2) = 104 ` Kcal/mole.
` = B.E . (H-H)`
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS AND THERMOCHEMISTRY

    CENGAGE CHEMISTRY|Exercise CONSOLIDATED EXERCISE|7 Videos

  • THERMODYNAMICS AND THERMOCHEMISTRY

    CENGAGE CHEMISTRY|Exercise CHALLENGING EXERCISE |7 Videos

  • THERMODYNAMICS AND THERMOCHEMISTRY

    CENGAGE CHEMISTRY|Exercise MANDATORY EXERCISE ( EXERCISE SET - I)|27 Videos

  • REACTION KINETICS AND CHEMICAL EQUILIBRIUM

    CENGAGE CHEMISTRY|Exercise OLYMPIAD AND NTSE LEVEL EXERCISES|10 Videos

Similar Questions

Explore conceptually related problems

Energy required to dissociate 4g of gaseous hydrogen into free gaseous atoms is 208Kcal at 25^(@)C The bond energy of H-H bond will be

Energy required to dissociate 4 g of gaseous H_(2) into free gaseous atoms is 872 kJ at 25^(@)C . The bond energy of H-H bond will be

The energy required to break 76 gm gaseous fluorine into free gaseous atom is 180 kcal at 25^(@) C. The bond energy of F - F bond will be

Energy required to dissociate 4 gms of H_(2)(g) into free atoms is 208 K.cals at 25^(@)C . The H-H bond energy will be

Calculate the bond energy of C-H Bond in methane.

The average energy required to break a P-P bond in P_(4)(s) into gaseous atoms is 53.2 kcal mol^(-1) . The bond dissociation energy of H_(2)(g) is 104.2kcal mol^(-1) , Delta H_(f)^(0) of PH_(3)(g) from P_(4)(s) is 5.5 kcal mol^(-1) . The P-H bond energy in kcal mol^(-1) is [ Neglect presence of Van der Waals force in P_(4)(s) ]

CENGAGE CHEMISTRY-THERMODYNAMICS AND THERMOCHEMISTRY-MANDATORY EXERCISE ( EXERCISE SET - II)
  1. When a gram atom of carbon is converted into a gram molecule of carbon...

    Text Solution

    |

  2. The enthalpy of formation of HI is +30.4 kJ. From this information whi...

    Text Solution

    |

  3. Standard molar enthalpy of formation of CO(2), is equal to

    Text Solution

    |

  4. Heat of formation (Delta Hf) of compounds are:

    Text Solution

    |

  5. Difference between heat of reaction at constant pressure and constant ...

    Text Solution

    |

  6. Reaction H(2)(g) + I(2) (g) to 2HI, Delta H("rxn") = 12.40 Kcal heat ...

    Text Solution

    |

  7. For the reaction. (i) H(2) (g) + Cl(g) to 2HCI(g) + x kJ (ii) H(2)...

    Text Solution

    |

  8. The amount of heat liberated when one mole of NH(4)OH reacts with one ...

    Text Solution

    |

  9. Delta H("neutrallisation") for the reaction . NaOH + HCl to NaCl + ...

    Text Solution

    |

  10. Hess's law deals with

    Text Solution

    |

  11. From the thermo chemical reaction C("graphite") + (1)/(2)O(2)(g) to...

    Text Solution

    |

  12. Given that A(s) to A(l),Delta H(1) = x A(l) to A(g) , Delta H(2) =...

    Text Solution

    |

  13. On combustion carbon forms two oxides CO and CO(2) heat of formation o...

    Text Solution

    |

  14. Heat evolved in calorie by the combustion of 1g of a fuel is called

    Text Solution

    |

  15. When 5 ml of a strong acid is added to 5 ml of an alkali the temperatu...

    Text Solution

    |

  16. The bond dissociation energy of C-H in CH(4), from the equation . C...

    Text Solution

    |

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

    Text Solution

    |

  18. Delta H and Delta E for the reaction S(s)+(3)/(2)(g) to SO(3)(g) are r...

    Text Solution

    |

  19. The enthalpy of formation of a compound is equal in magnitude but of o...

    Text Solution

    |

  20. The change of enthalpy of a chemical reaction it he same whether the r...

    Text Solution

    |