Question

For the chemical process, graph of energy and progress of reaction are plotted.

Which of the following is correct?

• A. It is the exothermic reaction, $\Delta H=b-a$
• B. Threshold energy, $e=a+c$
• C. $(E_a{)}_f<(E_a{)}_b$
• D. All of the above.

Answer 1

The correct option is D All of the above.

1. Enthalpy of reaction
($\Delta H=b-a=c-d$)
2. Threshold energy is $e$ which is also can be represented as $e=a+c$ and $e=b+d$
3. c is magnitude of activation energy of forward reaction and d is magnitude of activation energy of backward reaction.