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 factors affect the rate of a chemical reaction?

Back

Factors include temperature, concentration, surface area, and the presence of catalysts.

Front

How does surface area affect reaction rates?

Back

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

Front

What is the effect of temperature on reaction rates?

Back

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

Front

What role do catalysts play in chemical reactions?

Back

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

Front

Define activation energy.

Back

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

Front

What is the relationship between concentration and reaction rate?

Back

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

Front

Explain why powdered sugar reacts faster than large chunks of sugar.

Back

Powdered sugar has a greater surface area, allowing more collisions with reactants.

Front

What is meant by 'effective collision'?

Back

An effective collision is one that results in a chemical reaction, meaning it has sufficient energy and proper orientation.

Front

How does the presence of a solvent affect reaction rates?

Back

A solvent can facilitate or hinder the movement of reactants, affecting the frequency of collisions.