Collision theory and reaction rates

Front

What is collision theory?

Back

Collision theory states that for a reaction to occur, reactant particles must collide with sufficient energy and proper orientation.

Front

What role does a catalyst play in a chemical reaction?

Back

A catalyst increases the rate of a reaction by lowering the activation energy required for the reaction to occur.

Front

How does temperature affect reaction rates?

Back

Increasing temperature generally increases reaction rates by increasing the energy and frequency of particle collisions.

Front

What is activation energy?

Back

Activation energy is the minimum energy required for reactants to collide successfully and form products.

Front

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

Back

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

Front

How does surface area affect reaction rates?

Back

Increasing the surface area of solid reactants allows more particles to collide, thus increasing the reaction rate.

Front

What is the relationship between reaction rate and the frequency of collisions?

Back

Higher frequency of collisions generally leads to a higher reaction rate, as more opportunities for successful collisions occur.

Front

What is meant by 'successful collision' in collision theory?

Back

A successful collision occurs when reactant particles collide with enough energy and in the correct orientation to form products.

Front

How does a higher temperature influence the energy of particle collisions?

Back

A higher temperature increases the kinetic energy of particles, leading to more energetic collisions.

Front

What happens to reaction rates when a reaction is exothermic?

Back

In exothermic reactions, the release of energy can sometimes increase the rate of reaction, depending on the conditions.