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  •  The energy change accompanying the equilibrium reaction A  B is -33.0 <img alt=

 The energy change accompanying the equilibrium reaction A \rightleftharpoons B is -33.0 \mathrm{~kJ} / \mathrm{mol}. Asfaving that pre-exponential factor is same for forward and backward reaction answerer the following.
The energy of activation for forward and backward reactions \mathrm{( E_f \, and E_b )\, at \, 300 \mathrm{~K}.} Given that \mathrm{E_f \, and \, E_b.} are in ratio 20: 31.
 

Option: 1

64,33


Option: 2

60,93


Option: 3

93,60


Option: 4

90,60


Answers (1)

best_answer

\mathrm{ \begin{gathered} E_G=\frac{31}{20} \times E_F \text { - substitute } E_B \text { in (1) } \\ E_F-\frac{31}{20} E_F=-33 \\ -\frac{11}{20} E_F=-33 \\ E_F=\frac{33 \times 20}{11}=60 \mathrm{~kJ} / \mathrm{med} \end{gathered} }
Now,
\mathrm{E_b=E_f+33=60+33=93 \mathrm{~kJ} / \mathrm{mol} . }

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