Chemical Equilibrium and Reactions

If more reactants are added to a system at equilibrium, which way will the equilibrium shift?

• Forward (to the products)

• Reverse (to the reactants)

• Either

• Neither

If we removed some of the reactants, the reaction would shift

• Forward (to the products)

• Reverse (to the reactants)

• Either direction

• Neither

If a reaction is endothermic...

• the enthalpy (delta H value) is positive

• it requires heat

• heat acts as a reactant

• all of the above

What happens to an exothermic reaction when the temperature is increased?

• The reaction shifts forward (towards products)

• The reaction shifts reverse (towards reactants)

• It reaches equilibrium

• Only Le Chatelier knows

According to Boyle's law, what happens when the volume of a gas is decreased?

• Pressure decreases

• Pressure is constant

• Pressure increases

• The concentration decreases

When the volume of a reaction container is increased, how does the equilibrium shift?

• Toward the side with less particles of gas

• Toward the side with more particles of gas

• To the side with the solid particles

What does Le Chatelier's principle state?

• Equilibrium will remain unchanged under stress.

• Equilibrium is ONLY affected by temperature.

• Equilibrium is not affected by the concentration of reactants or products.

• Equilibrium will shift to reduce stress.