Chemical equilibrium

Question 1

Define the equilibrium constant:

Answer 1

The equilibrium constant is an expression of the concentrations of the products over the concentrations of the reactants for a reaction that is in equilibrium.

Question 2

Define dynamic equilibrium:

Answer 2

Dynamic equilibrium refers to a reversible reaction in which the forward and reverse reactions are taking place at the same rate, and hence the concentrations of the products and the reactants are constant.

Question 3

Define a closed system:

Answer 3

A closed system is one in which mass is conserved inside the system, but energy can enter and leave the system freely.

Question 4

Define an open system:

Answer 4

An open system is one in which both energy and matter can be exchanged between the system and its surroundings.

Question 5

Define a reversible reaction:

Answer 5

A reversible reaction is one in which products can be converted back into reactants.

Question 6

State Le Chatelier’s principle:

Answer 6

Le Chatelier’s principle states that when an external stress is applied to a system in dynamic chemical equilibrium, the equilibrium point will change in such a way as to counteract the stress.

Question 7

Define yield:

Answer 7

Yield is a measure of the extent of a reaction, generally measured by comparing the amount of product gained against the amount of product possible.