# How does increasing the pressure affect the reaction rate?

May 9, 2018

#### Answer:

Increasing the pressure increases the reaction rate (if it's a gaseous reaction).

#### Explanation:

Collision theory basically says that gaseous chemical reactions happen when reactant molecules collide with enough energy to break their chemical bonds.

When we increase the pressure in a reaction vessel:

• Particles will be closer together.
• Gas particles collide with each other more frequently.
• So, more collisions will happen.
• Reaction rate is therefore increased, because more particles are colliding to form products.