EOC Review #3

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs energy from its surroundings, usually in the form of heat.

Front

What happens to particle movement when energy is added to a phase?

Back

Particles go faster.

Front

Does increasing the concentration of reactants slow down the reaction?

Back

No, it does not slow down the reaction; it generally speeds it up.

Front

Why does a higher temperature increase the rate of a reaction?

Back

It increases both the frequency and energy of particle collisions.

Front

What factors can increase the rate of a reaction?

Back

Increasing temperature and increasing concentration.

Front

Define activation energy.

Back

Activation energy is the minimum amount of energy required for a chemical reaction to occur.

Front

What is the difference between an endothermic and exothermic reaction?

Back

Endothermic reactions absorb energy, while exothermic reactions release energy.

Front

How does temperature affect particle collisions?

Back

Higher temperatures increase the frequency and energy of particle collisions.

Front

What is the role of catalysts in chemical reactions?

Back

Catalysts speed up reactions by lowering the activation energy without being consumed in the process.

Front

What is the effect of surface area on reaction rates?

Back

Increasing the surface area of reactants increases the rate of reaction.