Question

For the following reaction system at equilibrium, which one of the changes would cause the equilibrium to shift to the right?

2NOBr(g) ⇌ 2NO(g) + Br2(g) ΔHo = 30 kJ

A) Decrease the volume of the reaction vessel.
B) Add some NO.
C) Remove some NOBr.
D) Add Br2.
E) Increase the temperature.

Answer 1

E

Explanation:

It is a endothermic reaction by its positive enthalpy change of reaction, thus by Le Chatelier's Principle, a increase in temperature would shift the equilibrium position to the right.

Theoretically, since the temperature increases, to balance the conditions and hence cause temperature to decrease the endothermic reaction's equilibrium is shifted to the right as there is a net energy take in as it proceeds from left to right.