Chemical Equilibrium

Question 1

Define A closed system

Answer 1

is one in which mass is conserved inside the system but energy can enter or leave the system freely.

Question 2

Define An open system

Answer 2

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

Question 3

Define A reversible reaction

Answer 3

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

Question 4

Define Dynamic chemical equilibrium

Answer 4

a reversible reaction in which the forward and reverse reactions take place simultaneously and at the same rate, hence the concentrations of reactants and products are constant.

Question 5

Define Equilibrium constant (Kc)

Answer 5

An expression of the concentration of the products over the concentration of the reactants for a reaction that is in equilibrium.

Question 6

Define Le Chatelier’s principle

Answer 6

When an external stress (change in pressure, temperature or concentration) is applied to a system in chemical equilibrium, the equilibrium point will change in such a way as to counteract the stress.

Question 7

Define Yield

Answer 7

A measure of the extent of a reaction, generally measured by comparing the amount of product formed against the amount of product that is possible.