Chemical equilibrium

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

In a chemical reaction at equilibrium, what happens when the concentration of a product decreases?

Back

The equilibrium shifts to favor more product formation.

Front

At what time is equilibrium established in a reaction?

Back

5 seconds.

Front

What do [C] and [D] represent in a chemical equilibrium expression?

Back

Concentration of products.

Front

What does the symbol ⇌ indicate about a reaction?

Back

The reaction is reversible.

Front

Define chemical equilibrium.

Back

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

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

How does temperature affect the position of equilibrium?

Back

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

Front

What is Le Chatelier's Principle?

Back

If a system at equilibrium is subjected to a change in concentration, temperature, or pressure, the system will adjust to counteract that change.

Front

What happens to equilibrium when the pressure is increased in a gaseous reaction?

Back

The equilibrium shifts towards the side with fewer moles of gas.