Home
Class 11
CHEMISTRY
If the activation enery for the forward ...

If the activation enery for the forward reaction is `150 "kJ mol"^(-1)` and that of the reverse reaction is `260 "kJ mol"^(-1)`. What is the ethalpy change for the reaction ?

A

`410 "kJ mol"^(-1)`

B

`-110 "kJ mol"^(-1)`

C

`110 "kJ mol"^(-1)`

D

`-410 "kJ mol"^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
`DeltaH=E_(f)=E_(b)=(150-260kJ)=-110kJ`
Promotional Banner

Topper's Solved these Questions

  • RATES OF REACTIONS AND CHEMICAL KINETICS

    DINESH PUBLICATION|Exercise Selected Straight|49 Videos

  • RATES OF REACTIONS AND CHEMICAL KINETICS

    DINESH PUBLICATION|Exercise Comprehension|13 Videos

  • RATES OF REACTIONS AND CHEMICAL KINETICS

    DINESH PUBLICATION|Exercise Ultimate Preparatory Package|29 Videos

  • PHYSICAL AND CHEMICAL EQUILIBRIA

    DINESH PUBLICATION|Exercise ULTIMATE PREPARATORY PACKAGE|13 Videos

  • REDOX REACTIONS

    DINESH PUBLICATION|Exercise Reasoning Type Questions|4 Videos

Similar Questions

Explore conceptually related problems

In an exothermic reaction A rarr B , the activation energy of the forward reaction is 200 kJ mol^(-1) . The enthalpy of the reaction is 280 kJ mol^(-1) . The activation energy of the reverse reaction B rarr A is

The activation energy of exothermic reaction ArarrB is 80 kJ "mol"^(-1) . The heat of reaction is 200 kJ "mol"^(-1) . The activation energy for the reaction Brarra ( in kJ/mol) will be :

The activation energy of H_(2)+I_(2) hArr 2HI in equilibrium for the forward reaction is 167 kJ mol^(-1) whereas for the reverse reaction is 180 kJ mol^(-1) . The presence if catalyst lowers the activation energy by 80 kJ mol^(-1) . Assuming that the reaction are made at 27^(@)C and the frequency factorr for the forward and backward reactions are 6xx10^(-4) and 3xx10^(-3) , respectively, calculate K_(c ) .

The activation energy of H_(2)+I_(2) hArr 2HI(g) in equilibrium for the forward reaction is 167 kJ mol^(-1) whereas for the reverse reaction is 180 kJ mol^(-1) . The presence of catalyst lowers the activation energy by 80 kJ mol^(-1) . Assuming that the reactions are made at 27^(@)C and the frequency factor for forwatd and backward reactions are 4xx10^(-4) and 2xx10^(-3) respectively, calculate K_(c) .

The reaction X to Y is an exothermic reaction. Activation energy of the reaction for X into Y is 150 kJ mol^(-1) . Enthalpy of reaction is 135 kJ "mol"^(-1) . Calculate the activation energy for the reverse reaction, Y to X in kJ mol^(-1) .

DINESH PUBLICATION-RATES OF REACTIONS AND CHEMICAL KINETICS-Revision Question
  1. In the reaction A +2B rarr C +2O the initial rate (-d[A])/(dt) at t=0w...

    Text Solution

    |

  2. Half life of a first order reaction and a zero order reaction are same...

    Text Solution

    |

  3. If the activation enery for the forward reaction is 150 "kJ mol"^(-1) ...

    Text Solution

    |

  4. The rate law for the reaction 2X +Y rarr Z is Rate = k[X][Y] The c...

    Text Solution

    |

  5. Consider the following statements (i) increase in the concentration ...

    Text Solution

    |

  6. The activation energy for a reaction at temperature T K was found to b...

    Text Solution

    |

  7. The time required for 100% completion of a zero order reaction is

    Text Solution

    |

  8. The following data is obtained during the first order thermal decompos...

    Text Solution

    |

  9. Consider the decomposition of N(2)O(5) as N(2)O(5)rarr2NO(2)+1//2O(2...

    Text Solution

    |

  10. For the reaction R rarr P, graph of [R] against time is found to be a ...

    Text Solution

    |

  11. In a catalyst experiment involving the Haber process N(2) + 3H(2) rarr...

    Text Solution

    |

  12. 10 g of a radioactive isotope is reduced to 1.25 g in 12 years. Theref...

    Text Solution

    |

  13. Plots showing the variation of the rate constant (k) with temperature ...

    Text Solution

    |

  14. The rate of the reaction A rarr products, at the initial concentration...

    Text Solution

    |

  15. For first order reaction, the time taken to reduce tha initial concent...

    Text Solution

    |

  16. The initial rates of reaction 3 A+ 2B +C rarr products at different in...

    Text Solution

    |

  17. The activation energy for a reaction at temperature T K was found to b...

    Text Solution

    |

  18. Units of rate constant depend upon

    Text Solution

    |

  19. Which one of the following statements for the order of a reaction is i...

    Text Solution

    |

  20. The rate of law for the reaction xA+yB=mP+nQ is Rate k[A]^(c)[B]^(d). ...

    Text Solution

    |