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Explain rate of reaction and the various factors affecting the reaction rate.
Rate of reaction is defined as the change in concentration of any one of the
reactant or product per unit time. The unit of rate of reaction is mol L-1
s-1. Factors affecting the reaction rate are:
a. Temperature: The rate of reaction is directly proportional to the
temperature. For 10K rise in temperature the reaction rate becomes double.
b. Nature of reactant: The amount of energy required for breaking a bond is
different for different bonds and the amount of energy released in the
formation of different bond is different.
c. Presence of a catalyst: Catalyst generally increases the rate of the reaction
without itself being consumed.
d. Concentration of the reactants: Concentration of the reactant is directly
proportional to the rate of the reaction. With decrease in the concentration
the rate of the reaction also decreases.
e. Surface area of the reactant: Greater the surface area, faster is the rate of
the reaction.
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