7.4 - Qualitative Changes in Equilibrium Systems

Question 1

Le Chatelier’s Principle

Answer 1

When a chemical system at equilibrium is disturbed by a change in property,
the system adjusts in a way that opposes the change

Question 2

equilibrium shift

Answer 2

a change in concentration to restore an equilibrium
state

Question 3

Changing pressure

Answer 3

If the pressure increases, the amount of collisions also increases
➢ This in turn increases the rate of reaction for the quantity of gas
molecules that can successfully collide

❖ Therefore, the increase pressure will always shift the equilibrium towards
the side that has less moles of gas (based on the balanced chemical
equation)
➢ The decrease of pressure will always shift the equilibrium towards the
side with more moles of gas

Question 4

Temp and Energy

Answer 4

In a thermochemical equation, we can generalize that thermal energy is a
product in an exothermic reaction and a reactant in an endothermic reaction
➢ Equilibrium will shift in the direction to compensate for energy changes