The Effect of Temperature on the Rate of Reaction

The Effect of Temperature on the Rate of Reaction

Aim-We is going to investigate how temperature effects the rate of

reaction when we use a Magnesium Ribbon and dissolve it in

Hydrochloric Acid.

Different Variables-There are four different variables that effect the

rate of reaction, surface area, concentration, temperature and

catalysts. Here is some information on each variable with diagrams.

How does surface area effect rate of reaction?

In a substance the rate of reaction will be quicker if it has a large

surface area. However, if it has a small surface area the rate of

reaction is much slower. Rate of Reaction is much faster if the

surface area is larger because much more of the reactant is exposed so

particles will be able to collide with it. A greater collision rate

means a faster reaction.

How does concentration effect the rate of reaction?

If more particles are added to a reactant, the concentration will

become higher. If a concentration is higher, the rate of reaction will

increase because there are more particles to collide.

How does temperature effect rate of reaction?

If a temperature is increased in a reaction the particles will be

given more kinetic energy to collide. As a result the rate of reaction

will increase because the particles will collide more frequently.

How do catalysts effect the rate of reaction?

Catalysts are added to chemical reactions to speed them up. Therefore

the rate of reaction is faster. Catalysts work by reducing the

activation energy to a minimum so the rate of reaction will be faster.

The rate of reaction also increases with the smallest amount of energy

when usi...

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... When a catalyst undergoes collision with the reactant molecules, less

energy is required for the chemical change to take place, and hence

more collisions have sufficient energy for reaction to occur. The

reaction

rate therefore increases.

Catalyst

Substance that alters the speed of, or makes possible, a chemical or

biochemical reaction but remains unchanged at the end of the reaction.

Concentration

In chemistry, the amount of a substance (solute) present in a

specified amount of a solution. Either amount may be specified as a

mass or a volume (liquids only).

The term also refers to the process of increasing the concentration of

a

solution by removing some of the substance (solvent) in which the

solute is dissolved. In a concentrated solution, the solute is present

in large quantities.