Collision Theory

• Molecules act as balls that bounce off each other and transfer energy during collisions​

For molecules to react there must be a collision

Concentration

If [ ] (concentration) increases more collisions are possible and reaction rate increases.

Temperature

If the temperature increases, then the kinetic speed of the molecule increases so the molecules start moving faster which makes them collide even more which increases the reaction rate.

Enthalpy and Chemical Reactions

Potential Energy

Stored energy within a bond. Position in space

Kinetic Energy

Energy in particles that are moving. Due to movement of the entire system or molecules.

Bond Energy

Energy required to break a bond between 2 atoms

Enthalpy = H

H = total kinetic and potential energy combined in a system at constant pressure.

prod = final : react = initial

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