Equilibrium Test Review

Explain the difference between dynamic and steady state equilibrium? What is chemical equilibrium generally concerned with?

• Chemical equilibrium is generally concerned with dynamic equilibrium, where the rate of forward and reverse reactions are equal

• Steady state is when the rate at which a substance enters the system is equal to the rate it leaves

Explain a reversible reaction

Reactants form products, which then break down back into reactants

How does the value of the reaction quotient change the direction of equilibrium?

• Q>K reaction shifts left, makes more reactants

• Q<K reaction shifts right making more products

• Q=K reaction is at equilibrium

According to Le Chatelier’s Principle, explain how concentration changes equilibrium.

• Adding concentration will cause the system to shift to use up the added amount.

• Adding a reactant will make more product, while adding a product will make more reactant

• The reverse is true it a reactant or product are removed.

Explain how volume changes equilibrium.

• As volume decreases, pressure increases and the system will shift to the side with the fewest moles of gas.

• The reverse is true as volume increases

Explain how temperature impacts equilibrium

• In endothermic reactions, temperature increases K, and results in more products

• In exothermic reactions, increasing temperature decreases K resulting in more reactants

What impact does a catalyst have on equilibrium concentrations?

None, they would reach the same concentration at a faster rate.