Chemistry in the Earth System IS4T3 Review: Collision Theory

Front

What is Collision Theory?

Back

Collision Theory states that for a reaction to occur, reactant particles must collide with sufficient energy and the correct orientation.

Front

How does temperature affect reaction rates?

Back

Higher temperatures increase the rate of a reaction by increasing both the frequency and energy of particle collisions.

Front

What is a catalyst?

Back

A catalyst is a substance that increases the rate of a reaction without being consumed, by providing an alternative pathway with a lower activation energy.

Front

What is activation energy?

Back

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

Front

How does concentration affect reaction rates?

Back

Increasing the concentration of reactants generally increases the rate of reaction due to a higher frequency of collisions.

Front

What role does surface area play in reaction rates?

Back

Increasing surface area allows more exposed sites for reactants to collide, thus increasing the rate of reaction.

Front

What is the relationship between surface area and reaction rate?

Back

Increasing surface area increases the rate of reaction.

Front

What happens to reaction rates at lower temperatures?

Back

Lower temperatures decrease the rate of reaction due to reduced energy and frequency of particle collisions.

Front

What is the effect of a higher concentration of reactants?

Back

A higher concentration of reactants increases the likelihood of collisions, thus increasing the reaction rate.

Front

How do catalysts affect activation energy?

Back

Catalysts lower the activation energy required for a reaction, making it easier for the reaction to occur.