Question

Select the correct statements:

In a hypothetical reaction $C\to Y,$ the activation energy for the forward and backward reaction is 15 and $9kJmo{l}^{-1},$ respectively. The potential energy of X is 10 kJ $mo{l}^{-1}$. Then Plot of $r_{1/2}$ vs. concentration.

• A. The heat of reaction is 6 kJ.
• B. The potential energy of Y is 16 kJ.
• C. The threshold energy of the reaction is 25 kJ.
• D. The reaction is endothermic.

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A The heat of reaction is 6 kJ.
B The potential energy of Y is 16 kJ.
C The threshold energy of the reaction is 25 kJ.
D The reaction is endothermic.

For Reaction $X\to Y$

$E_{a\left(f\right)}=15kJmo{l}^1{E}_{a\left(b\right)}=9kJmo{l}^1$

Heat reaction $E_{a\left(f\right)}{R}_{a\left(b\right)}=159=6kJmo{l}^1$

Potential energy of Y is = 10 + 6 = 16 kJ

Threshold energy of the reaction = PE of X + $E_{a\left(f\right)}$

= 10 kJ + 15 kJ

= 25 kJ

The reaction is endothermic because $E_{a\left(f\right)}>E_{a\left(b\right)}$