Chemistry- Collision Theory

Kinetics

The study of the rate, or speed, of a chemical reaction

Activation Energy

The energy needed to go from the reactants to the top of the barrier.

Collision theory

Things that make a chemical reaction happen.

Particles must collide

Proper orientation of colliding molecules is essential.

Collisions must occur with enough energy

Factors that affect the reaction rate

Decrease reaction vessel size

Increase the concentration of the reactants

Increase the temperature of the reaction

Exothermic reaction

Energy releases from the system

It feels hot

Change H= -

Reactant energy is more than product energy

Endothermic reaction

Energy is absorbed from it’s surroundings in the form of heat

Feels cold

Reactant energy is less than product energy

Enthalpy

the sum of a system's internal energy and the product of its pressure and volume