Difficult
For the equilibrium $A_{(g)} \rightleftharpoons B_{(g)}$,$\Delta H$ is $-40 \ kJ/mol$. If the ratio of the activation energies of the forward $(E_f)$ and reverse $(E_b)$ reactions is $\frac{2}{3}$,then:
- A$E_f = 80 \ kJ/mol; E_b = 120 \ kJ/mol$
- B$E_f = 60 \ kJ/mol; E_b = 100 \ kJ/mol$
- C$E_f = 30 \ kJ/mol; E_b = 70 \ kJ/mol$
- D$E_f = 70 \ kJ/mol; E_b = 30 \ kJ/mol$
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