Higher Chemistry - Rates of Reactions

Front

What is an effective collision?

Back

An effective collision occurs when molecules collide with the proper orientation and enough kinetic energy.

Front

How does higher concentration affect the rate of reaction?

Back

Higher concentration increases the frequency of particle collisions.

Front

What is the role of a catalyst in a chemical reaction?

Back

A catalyst speeds up a reaction by lowering the activation energy.

Front

Why don't all collisions between particles result in a reaction?

Back

Not all particles collide with enough energy to cause a reaction.

Front

What does a positive ΔH value indicate in a reaction?

Back

A positive ΔH value indicates that the reaction is endothermic.

Front

What is activation energy?

Back

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

Front

How does temperature affect reaction rates?

Back

Increasing temperature generally increases reaction rates by providing more kinetic energy to the particles.

Front

What is the effect of surface area on reaction rates?

Back

Increasing surface area increases the rate of reaction by allowing more particles to collide.

Front

What is a chemical reaction?

Back

A chemical reaction is a process where reactants are transformed into products.

Front

What is the difference between endothermic and exothermic reactions?

Back

Endothermic reactions absorb heat, while exothermic reactions release heat.