Rates of Reactions

Front

What is a catalyst?

Back

A substance that increases the rate of a chemical reaction without being consumed in the process.

Front

How does a catalyst affect the activation energy of a reaction?

Back

It lowers the activation energy required for the reaction to occur.

Front

What is the effect of concentration on the rate of reaction?

Back

Higher concentration of reactants generally increases the rate of reaction.

Front

How does temperature affect the rate of a chemical reaction?

Back

Increasing temperature usually increases the rate of reaction by providing more energy to the reactants.

Front

What is surface area in the context of chemical reactions?

Back

Surface area refers to the exposed area of a solid reactant; increasing surface area increases the rate of reaction.

Front

What is an endothermic reaction?

Back

A reaction that absorbs heat from its surroundings, usually resulting in a temperature decrease.

Front

What is an exothermic reaction?

Back

A reaction that releases heat to its surroundings, usually resulting in a temperature increase.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; the total mass of reactants equals the total mass of products.

Front

What is activation energy?

Back

The minimum energy required for a chemical reaction to occur.

Front

How does particle size affect the rate of reaction?

Back

Smaller particle size increases the rate of reaction by providing a larger surface area for collisions.