1.5 Collision Theory

What are the three requirements for a reaction to occur according to Collision Theory?

1. Molecules must collide. 2. Molecules must have sufficient kinetic energy (KE). 3. Molecules must have correct molecular geometry.

How does increasing pressure affect the reaction rate?

Increasing pressure increases the reaction rate.

What is kinetic energy (KE)?

The energy that a particle has as a result of motion.

How do temperature changes affect reaction rates?

Higher temperature increases the reaction rate by increasing the frequency and energy of collisions.

What happens to reaction rates when the concentration of reactants increases?

Increasing concentration leads to a higher reaction rate due to more successful collisions.

What is the effect of surface area on reaction rates?

Increased surface area leads to a higher reaction rate due to more chances for collisions.

What is the relationship between kinetic energy and temperature?

Temperature is a measure of the average kinetic energy (KE) of particles in a substance.

What does a successful collision require in terms of molecular geometry?

A successful collision requires a specific arrangement of reactants during the collision.

What is the outcome of the reaction H2 + I2 → 2HI if the geometry of the collision is incorrect?

There will be no reaction.

Why does higher temperature lead to more successful collisions?

Higher temperature causes molecules to move faster, resulting in more forceful and frequent collisions.

What is the impact of low temperature on reaction rate?

Lower temperature results in lower kinetic energy, leading to less frequent collisions and a lower reaction rate.