Le Chaterlier and Equilibrium expressions

Front

What does a negative ΔH represent?

Back

An exothermic reaction.

Front

What happens to the equilibrium when heat is removed from a cooled system?

Back

The reaction shifts left, towards the reactants.

Front

In an exothermic reaction at equilibrium, what happens if heat energy is removed?

Back

The equilibrium will shift toward the product side.

Front

What does it mean if the equilibrium constant (K) is much greater than one (K >> 1)?

Back

Equilibrium lies to the right (products are favored).

Front

What happens if only reactants are added to a reaction at equilibrium?

Back

The reaction can only shift right to make products.

Front

Define 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 and restore a new equilibrium.

Front

What is an endothermic reaction?

Back

A reaction that absorbs heat from its surroundings.

Front

How does increasing the temperature affect an exothermic reaction at equilibrium?

Back

The equilibrium will shift left, towards the reactants.

Front

What is the effect of increasing pressure on a gaseous equilibrium reaction?

Back

The equilibrium will shift towards the side with fewer moles of gas.

Front

What is the equilibrium constant (K)?

Back

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