Rates of Reactions

Front

What happens to the rate of a reaction when the concentration of reactants is increased?

Back

The rate of the reaction increases.

Front

What two factors determine if a collision between reacting particles will be effective?

Back

Energy and orientation.

Front

How does smaller particle size affect the surface area available for a reaction?

Back

Smaller particle size allows for a larger surface area to be exposed for the reaction.

Front

Why does increasing temperature lead to a faster reaction rate?

Back

It increases both the frequency and energy of particle collisions.

Front

What are the factors that can increase the rate of a reaction?

Back

Increasing temperature, increasing concentration, increasing surface area.

Front

Define 'activation energy'.

Back

The minimum energy required for a chemical reaction to occur.

Front

What is the effect of a catalyst on a chemical reaction?

Back

A catalyst increases the rate of a reaction by lowering the activation energy.

Front

Explain the term 'collision theory'.

Back

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

Front

What role does temperature play in the kinetic energy of particles?

Back

Higher temperatures increase the kinetic energy of particles, leading to more frequent and energetic collisions.

Front

How does increasing surface area affect reaction rates?

Back

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