Home
Class 11
CHEMISTRY
Hydrazine , N(2)H(4) , contains aN-N sin...

Hydrazine , `N_(2)H_(4) ,` contains aN-N single bond and 4N -H bonds . Use bond energies to calculate `DeltaH`in KJ for the reaction :
`N_(2)+2H_(2)toN_(2)H_(4)`
`{:(Bond ,"Energies" (KJ.mol^(-1))),(H-H,436),(H-N,386),(N-N,193),(N=N,418),(N-=N,941):}`

A

`-425KJ`

B

`-76KJ`

C

`76KJ`

D

`245KJ`

Text Solution

Verified by Experts

The correct Answer is:
c
Promotional Banner

Topper's Solved these Questions

  • SALT ANALYSIS

    GRB PUBLICATION|Exercise Subjective Type|69 Videos

Similar Questions

Explore conceptually related problems

Use bond energies to estimate the value of DeltaH^(@) for the reaction : N_(2)(g)+3H_(2)(g)to2NH_(3)(g) {:(Bond,"EnergiesKJ/mol"),(H-H,436),(H-N,386),(N-N,193),(N=N,418),(N-=N,941):}

Bond energy of N-H,H-H and N-=N are a,b,c respectively. The DeltaH for the reaction, 2NH_(3) rarr N_(2)+3H_(2) is :

N- H Bond in Ammonia molecule is

The two bonds N = O and N - O in H_3CNO_2 are of same bond length due to

For the reaction, N_(2)H_(4)(l) to N_(2)(g) + 2H_(2)(g) DeltaH^(@) =-50.6kJ. This reaction 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

GRB PUBLICATION-THERMODYNAMICS-All Questions
  1. Which of these coversios has a poitive DeltaS^(@)? (p)combustion of ...

    Text Solution

    |

  2. Given these reactions : Ato2B DeltaH=40KJ BtoCDeltaH=-50KJ 2CtoD ...

    Text Solution

    |

  3. Hydrazine , N(2)H(4) , contains aN-N single bond and 4N -H bonds . Use...

    Text Solution

    |

  4. Rank the enthalpy of fusion , sublimation and vaporization for water :

    Text Solution

    |

  5. The stande enthalpy of formation for NH(3)(g)is -46.1KJxxmol^(-1) .Cal...

    Text Solution

    |

  6. Which are exothrmic processes? (p) Combustion of ethane (Q)Dehyratio...

    Text Solution

    |

  7. Which sets of chemicals , when mixed , produce the observation (s) lis...

    Text Solution

    |

  8. The vapour pressure of phoshorus trichoride is100 mm Hg at 21.0^(@) an...

    Text Solution

    |

  9. Estimate the enthalpy of combustion of methane in KJ .mol^(-1) CH(4)...

    Text Solution

    |

  10. Which Statement is always true for an exothermic reaction ?

    Text Solution

    |

  11. For which reaction is DeltaH(rxn)^(@) equal to DeltaH(f)^(@) for CUSO...

    Text Solution

    |

  12. What is the value of DeltaH^(@) (inKJ) for this reaction ?ltbr gt ...

    Text Solution

    |

  13. The heat of a reaction is measured in a bomb calorimeter . This heat i...

    Text Solution

    |

  14. NO(g)to(1)/(2)N(2)(g)+(1)/(2)O(2)(g),DeltaH(1)^(@) 2NO(g)toN(2)O(g)+...

    Text Solution

    |

  15. When 2.74 g of Ba(s) reacts with O(2)(g) at 298K and 1 atm to from Ba(...

    Text Solution

    |

  16. Determine DeltaH(rxn) for the reaction in KJ .mol^(-1) 2NH(3)(g)+(5)...

    Text Solution

    |

  17. Calculate Delta E when one mole of liuid is vaporized at its boiling p...

    Text Solution

    |

  18. Use the following data to calculate the molar enthalpy of combustion o...

    Text Solution

    |

  19. Determine the enthalpy change for the reaction of 5.00 g Fe(2)O(3)with...

    Text Solution

    |

  20. The energies of the bonds broken in a certain eaction arae greater th...

    Text Solution

    |