2.2 Equilibrium and Yield (Part 4 of 4)

What happens to the concentration of gases when the volume they are contained in is decreased?

• No change in the concentration of gases

• The concentration of both gases decreases

• The concentration of both gases increases

• The concentration of one gas increases while the other decreases

If the pressure in a system increases, what does the system do in response?

• Increases the pressure even more

• Does not change

• Favors the side with fewer moles

• Favors the side with more moles

What color change occurs when the concentration of NO2 decreases and N2O4 increases?

• From dark brown to light brown

• From colorless to light brown

• From light brown to colorless

• From light brown to dark brown

What can be inferred if the concentration of reactants increases after a decrease in temperature?

• The backward reaction is exothermic

• The forward reaction is exothermic

• The reaction does not depend on temperature

• The backward reaction is endothermic

What is the effect of decreasing the temperature on an exothermic reaction at equilibrium?

• Shifts the equilibrium to the right

• No effect on the equilibrium

• Shifts the equilibrium to the left

• Increases the temperature of the system

What does a negative Delta H value indicate about a reaction?

• The reaction is endothermic

• The reaction is at equilibrium

• The reaction does not release or absorb heat

• The reaction is exothermic

What happens to the concentrations of SO2 and O2 when the temperature is decreased in a reaction producing SO3?

• SO2 decreases and O2 increases

• Both concentrations increase

• Both concentrations decrease

• SO2 increases and O2 decreases