1. Imagine you are carrying out an exothermic reaction. What happens to the posi

Question

1. Imagine you are carrying out an exothermic reaction. What happens to the position of equilibrium if this reaction is heated?

2. On a molecular level and using the concepts of kinetics (molecules movement and reaction rate), explain what happens when a reactant is added to a system that is otherwise at equilibrium. For example, given the equilibrium below, what occurs when more molecules of “A” are added to the system as it progresses toward reestablishing equilibrium? A(aq) + B(aq) C(aq) + D(aq)

Explanation / Answer

1) an exothermic reaction means the reaction is accompained with release of heat (if an equilibrium is exothermic in forward direction it must be endothermic in reverse direction). Since the reaction already is releasing heat a lower temperature favours the forward reaction. However, increasing the temprature will leads to shifting the equilibrium to the side where it is endothermic i.e. towards reverse direction.

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