Home
Class 12
CHEMISTRY
For a hypothetical reaction A to B then...

For a hypothetical reaction ` A to B` then activation energy for forward and backward reactions are 19 kJ/mol and 9 kJ /mol respectively. The heat of reaction is

A

`9 kJ mol ^(-1)`

B

`19 kJ mol ^(-1)`

C

`+ 10 kJ mol^(-1)`

D

`28 kJ mol^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
`Delta H _("Reaction") = E _(a ("Forward"))- E _(a ("Backward"))`
`= 19 - 9 = + 10 kJ mol ^(-1)`
Promotional Banner

Topper's Solved these Questions

  • BIOMOLECULES TEST

    NTA MOCK TESTS|Exercise MULTIPLE CHOICE QUESTIONS|30 Videos

  • CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES TEST

    NTA MOCK TESTS|Exercise SINGLE CHOICE |30 Videos

Similar Questions

Explore conceptually related problems

The reaction A to C has activation energy for the forward and the backward reaction has 25 kJ and 32 KJ respectively. The DeltaH for 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 In a hypothetical reaction A rarr B , the activation energies for the forward and backward reactions are 15 and 9 kJ mol^(-1) , respectively. The potential energy of A is 10 kJ mol^(-1) . Which of the following is wrong?

In a hypothetical reaction X rarr Y , the activation energy for the forward and backward reactions is 15 and 9 kJ mol^(-1) , respectively. The potential energy of X is 10 kJ mol^(-1) . Then Plot t_(1//2) vs. concentration

NTA MOCK TESTS-CHEMICAL KINETICS TEST -1-MULTIPLE CHOICE QUESTIONS
  1. For a hypothetical reaction A to B then activation energy for forward...

    Text Solution

    |

  2. The rate law for reaction between the substances A and B is given by R...

    Text Solution

    |

  3. If a homogeneous catalytic reaction can take place through three alter...

    Text Solution

    |

  4. At the point of intersection of the two curves shown, calculate the co...

    Text Solution

    |

  5. Benzene diazonium chlride in aqueous solution decomposes as : C (6) ...

    Text Solution

    |

  6. For the reaction mechanism of the reaction. 2 NO (g) + 2 H (2) (g) t...

    Text Solution

    |

  7. The half-life of two samples of same compound is 0.1 s and 0.4 s. Thei...

    Text Solution

    |

  8. 2 N (2) O (5) hArr 4 NO (2) + O (2) For the reaction above, which o...

    Text Solution

    |

  9. Rate of reacton depens upon

    Text Solution

    |

  10. For the two gaseous reactions following data is given, A to B, k (1)...

    Text Solution

    |

  11. The rate law for the chemical reaction 2 NO (2) Cl to 2 NO (2) + Cl ...

    Text Solution

    |

  12. Observe the following reaction, 2 A + B to C The rate of formation...

    Text Solution

    |

  13. For a reaction (1)/(2) A to 2B, the rate of disappearance of 'A' is re...

    Text Solution

    |

  14. 1 g of ""(79) Au ^(198) (t (1//2) = 65h) give stable marcury by beta-e...

    Text Solution

    |

  15. If the instantaneous rate of appearance of NO (2) (g) is 0.0400M//s at...

    Text Solution

    |

  16. For the reaction , 2 NO (g) + 2 H (2) (g) to N (2) (g) + 2 H (2) ...

    Text Solution

    |

  17. The reaction 2 NO (2) + F(2) to 2 N (2) F, occurs in the following s...

    Text Solution

    |

  18. By what factor does the rate of reaction increases when the temperatur...

    Text Solution

    |

  19. For reaction A + 2 B to C + D rate law R = k [A] ^(1) [B] ^(2). By wha...

    Text Solution

    |

  20. For a gaseous reaction , following data is given: A to B, k (1) = 10...

    Text Solution

    |