Question

Using le chatlier's principle, describe how to shift the equilibrium of an exothermic reaction to the left, to make less product ?

Answer 1

if the reaction is exothermic you can write the equation with heat in the products

A+B -> C + heat

Le Chatelier"s will said if you increase the heat (product) the equilibrium will move to the left

in the opposite case if the reaction were endothermic you can write the heat as a reactant
A+ B+ heat -> C

then a decrease in heat will make the reaction move to the left