Single Choice

An endothermic reaction, A$$\rightarrow $$ B has an activation energy 15 kcal/mol and energy of the reaction is 5 kcal/mol. The activation energy of the reaction, B $$\rightarrow $$ A is:

A20 kcal/mol
B15 kcal/mol
C10 kcal/mol
Correct Answer
D5 kcal/mol

Solution

For an endothermic reaction, the activation energy for the backward reaction is equal to the difference of the activation energy of the forward reaction and the enthalpy change of the reaction.

Thus, the activation energy of the reaction $$B \rightarrow A$$ is $$15 -5=10 \ kcal.$$

SIMILAR QUESTIONS

Physical World

In the equilibrium, $$A+ B\leftrightharpoons C + D$$, the activation energy for the forward reaction is 25Kcal/mol and that of backward reaction is 15Kcal/mol. Which one of the following statement is correct?

Physical World

In which of the following case, $$E_a$$ of the backward reaction is greater than that of the forward reaction?

Physical World

For the equilibrim, $$A(g) \rightleftharpoons B(g)$$, $$\Delta H= - 40\ kJ/mol$$. If the ratio of the activation energies of the forward $$(E_f)$$ and reverse $$(E_b)$$ reaction is $$\dfrac{2}{3}$$ then:

Physical World

A reaction having equal energies of activation for forward and reverse reactions has :

Physical World

In a hypothetical reaction $$X\rightarrow Y$$, the activation energy for the forward and backward reactions are $$15$$ and $$9\ kJ\ mol^{-1}$$ respectively. The potential energy of $$X$$ is $$10\ kJ\ mol^{-1}$$. Which of the following statements is/are correct? (i) The threshold energy of the reaction is $$25\ kJ$$ (ii) The potential energy of $$Y$$ is $$16\ kJ$$ (iii) Heat of reaction is $$6\ kJ$$ (iv) The reaction is endothermic.

Physical World

For an endothermic reaction, $$\triangle H$$ represents the enthalpy of the reaction in $$kJ\ mol^{-1}$$. The minimum amount of activation energy will be:

Physical World

Overdraft as per the pass book is less than the overdraft as per cash book when there are cheques deposited but not collected by the banker.

Physical World

If the rent received in advance 2,000. The adjustment entry will be ________.

Physical World

On February $$1$$, $$2011$$, John purchased goods for Rs. $$15,000$$ from Jimmi. He immediately made a payment of Rs. $$5,000$$ by cheque and for the balance accepted the bill of exchange drawn upon him by Jimmi. The bill of exchange was payable after $$40$$ days. Five days before the maturity of the bill, Jimmi sent the same to his bank for collection. The bank duly presented the bill to John on the due date who met the bill. The bank informed the same to Jimmi. Prepare John's account in the books of Jimmi and Jimmi's account in the books of John.

Physical World

Show the treatment of prepaid expenses, depreciation, closing stock at the time of preparation of final accounts (a) When given inside the trial balance. (b) When given outside the trial balance.

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