Home
Class 12
CHEMISTRY
The energy of activations for forward an...

The energy of activations for forward and backward change for an endothermic reaction, `X rarr Y` are `E_(f)` and `E_(b)` respectively. Which of the following is correct ?

A

`E_(b) lt E_(f)`

B

`E_(b) gt E_(f)`

C

`E_(b) = E_(f)`

D

No relation between them

Text Solution

Verified by Experts

The correct Answer is:
A
`Delta H = E_(f)-E_(b)`
`because Delta H = +ve`
`:. E_(f) gt E_(b)`
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL KINETICS

    A2Z|Exercise Parallel Reaction, Consecutive Reaction, Special Cases Of First-Order Reactions|25 Videos

  • CHEMICAL KINETICS

    A2Z|Exercise Section B - Assertion Reasoning|21 Videos

  • CHEMICAL KINETICS

    A2Z|Exercise Initial Rate Method And Ostwaid Method|18 Videos

  • BIOMOLECULES

    A2Z|Exercise Section D - Chapter End Test|30 Videos

  • COORDINATION COMPOUNDS

    A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

Activation energy of forward and backward process of reaction are 60 kJ and 40 kJ "mol"^(-1) respectively . Which of the following are true the reaction ?

Energy of activation of forward and backward reaction are equal in case (numerical calues) where

If the activation energies of the forward and backward reactions of a reversible reaction are E_(a)(f) and E_(a)(b) , respectively. The DeltaE of the reaction is ………..

When the activation energies of the forward and backward reactions are equal, then :

The activation energies of the forward and backward reactions in the case of a chemical reaction are 30.5 and 45.4kJ/mol respectively. The reaction is:

A colliison between reactant molecules must occur with a certain minimum energy before it is effective in yielding Product molecules. This minimum energy is called activation energy E_(a) Large the value of activation energy, smaller the value of rate constant k . Larger is the value of activation energy, greater is the effect of temperature rise on rate constant k . E_(f) = Activation energy of forward reaction E_(b) = Activation energy of backward reaction Delta H = E_(f) - E_(b) E_(f) = threshold energy The activation eneries for forward and backward reactions in a chemical reaction are 30.5 and 45.4 kJ mol^(-1) respectively. The reaction is

The activation energies of the forward and backward reactions in the case of a chemical reaction are 30.5 and 45.5 KJ/mol , respectively . The reaction is:

A2Z-CHEMICAL KINETICS-Arrhenius Equation, Effect Of Temprature And Effect Of Catalysts
  1. A large increase in the rate of a reaction for a rise in temperature i...

    Text Solution

    |

  2. The rate constant (K') of one reaction is double of the rate constant ...

    Text Solution

    |

  3. The energy of activations for forward and backward change for an endot...

    Text Solution

    |

  4. The maximum value of activation energy is equal to:

    Text Solution

    |

  5. The rate constant, the activation energy, and the Arrhenius parameter ...

    Text Solution

    |

  6. Which is incorrect from the theory of Arrhenius's equation ?

    Text Solution

    |

  7. Rate of a reaction can be expressed by Arrhenius equation as: k = Ae...

    Text Solution

    |

  8. The Delta H value of the reaction H(2)+Cl(2) hArr 2HCl is -44.12 kcal....

    Text Solution

    |

  9. The Activation energy for a chemical reaction mainly depends upon

    Text Solution

    |

  10. A molecule of gas is struck by another molecule of the same gas, the f...

    Text Solution

    |

  11. Activation energy of a chemical reaction can be determined by

    Text Solution

    |

  12. The energies of activation for forward and reverse reaction for A(2)+...

    Text Solution

    |

  13. ArarrB, DeltaH= -10 KJ mol^(-1), E(a(f))=50 KJ mol^(-1), then E(a) of ...

    Text Solution

    |

  14. The rate of a reaction doubles when its temperature changes form 300 K...

    Text Solution

    |

  15. The rate of a chemical reaction doubles for every 10^(@)C rise of temp...

    Text Solution

    |

  16. A reactant (A) forms two products A overset (k(1))rarr B, Activation...

    Text Solution

    |

  17. The first-order rate constant k is related to temperature as log k = 1...

    Text Solution

    |

  18. The Arrhenius relationship of two different reactions is shown below. ...

    Text Solution

    |

  19. The rate constant of most of the reaction increases with increase in t...

    Text Solution

    |

  20. For a reaction, the rate constant is expressed as k = Ae^(-40000//T). ...

    Text Solution

    |