Now, we increase temperature by adding energy and that means we're adding heat. Now, if we're adding heat, that means one of our products, namely the heat guide is increased. So the concentration is not really concentration but you could think of energy concentration of our heat increases. Now, if you think of this as the reaction quotient, that means our ratio will increase. So our Q will become greater than our K.
And that means as K is bigger than Q, there will be a leftward shift of equilibrium. In other words, these guys will tend to react to convert back to our reactants, namely these two guys.