Collision Theory and Chemical Reaction Rate

1. Define Collision Theory ​and describe how it affects the chemical reaction

2. ​Explain the different factors affecting the rate of chemical reaction

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Identify the following statement whether the statement is a Chemical or Physical Change​

​chemical reaction, occurs when atoms of a substance are rearranged, and the bonds between the atoms are broken or formed

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​ Change in Temperature

• Change in Color

• Noticeable Odor (after reaction has begun)

• Formation of a Precipitate

• Formation of Bubbles

is any change in a substance’s form that does not change its chemical makeup

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​ Texture

• Color

• Temperature

• Shape

• Change of State

All substances are comprised of millions of tiny particles in constant motion. These particles are colliding with each other constantly in any substance. All collisions between particles do not result in a reaction

• ​Substances or particles of reactants must physically collide with enough energy

• ​Substance or particles must come into contact or collide in the correct orientation (facing the correct way).

​The collision theory states that reacting substances must come into contact (collide) with enough activation energy, and in the correct orientation (facing the correct way), so that their electron shells can rearrange to form the products of the reaction

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​Therefore, any factor which changes the frequency or energy of the collisions will change the rate of the reaction.

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​When two particles collide, sometimes a chemical reaction can occur, which means the bonds between two or more particles are broken and reformed, creating one or more new substances. The substances or particles that enter and is changed in the chemical reaction are called reactants and the substances that are formed are called products.