Chemical Equilibrium

Front

What state of matter is affected by changes in pressure?

Back

Gaseous

Front

What does the symbol ⇌ indicate about a reaction?

Back

Reversible

Front

What is the K_eq expression for the reaction 2 NO(g) + O2(g) ⇌ 2 NO2(g)?

Back

K_eq = [NO2]^2 / [NO]^2[O2]

Front

What is a forward reaction?

Back

The reaction that forms products from reactants.

Front

What are the two factors to determine if a reaction is at equilibrium?

Back

Forward and reverse reaction rates are equal and amounts of reactants and products are constant.

Front

What is chemical equilibrium?

Back

A state in a reversible reaction where the rates of the forward and reverse reactions are equal.

Front

What is the effect of temperature on equilibrium?

Back

Changing the temperature can shift the position of equilibrium depending on whether the reaction is exothermic or endothermic.

Front

What is Le Chatelier's Principle?

Back

If a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium shifts to counteract the change.

Front

What is the equilibrium constant (K_eq)?

Back

A numerical value that expresses the ratio of the concentrations of products to reactants at equilibrium.

Front

What happens to the equilibrium position if the concentration of reactants is increased?

Back

The equilibrium position shifts to the right, favoring the formation of products.