What is the effect of a temperature change on a chemical reaction initially at equilibrium? How does the effect differ for an exothermic reaction compared to an endothermic one?
a) It increases the rate of the forward reaction for both exothermic and endothermic reactions.
b) It decreases the rate of the forward reaction for both exothermic and endothermic reactions.
c) For an exothermic reaction, increasing the temperature shifts the equilibrium towards the reactants, while for an endothermic reaction, it shifts towards the products.
d) For an exothermic reaction, increasing the temperature shifts the equilibrium towards the products, while for an endothermic reaction, it shifts towards the reactants.