Reaction Rate & LeChatelier's Principle

Front

What is the effect of adding a catalyst to a chemical reaction?

Back

A catalyst speeds up the reaction without being consumed, but it does not favor either the products or reactants.

Front

What does ΔH represent in a chemical reaction?

Back

ΔH represents the change in enthalpy, or heat content, of a reaction.

Front

If the concentration of a reactant is increased, what happens to the equilibrium position?

Back

The equilibrium will shift toward the products to counteract the increase in reactant concentration.

Front

What happens to the concentration of a reactant if a product is removed from a system at equilibrium?

Back

The concentration of the reactant will increase as the system shifts to replace the removed product.

Front

What is LeChatelier's Principle?

Back

LeChatelier's Principle states that if a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium shifts to counteract the change.

Front

How does temperature affect an exothermic reaction at equilibrium when heat is added?

Back

The equilibrium will shift to the left, favoring the reactants.

Front

What is the effect of decreasing the concentration of a product in a reaction at equilibrium?

Back

The equilibrium will shift to the right, favoring the formation of more products.

Front

In the reaction N2 + O2 <-> 2NO, what happens if heat is removed?

Back

The concentration of NO will decrease as the equilibrium shifts to the left to produce more heat.

Front

What is the relationship between reaction rate and concentration of reactants?

Back

Generally, an increase in the concentration of reactants leads to an increase in the reaction rate.

Front

What does it mean if a reaction is at equilibrium?

Back

At equilibrium, the rates of the forward and reverse reactions are equal, and the concentrations of reactants and products remain constant.