An increase in temperature increases the reaction rate because

Temperature is considered to be one of the most important factors that are responsible for a chemical reaction to take place. This forms the major energy source that enhances the reaction rate. There is a direct relationship between the temperature and the reaction rate, as they are directly proportional to each other. An increase in temperature by about 10°C can result in double of the reaction rate at normal room temperature. By increasing the temperature, the molecules are forced to collide unevenly, with one another at greater energy, which eventually allows a reaction to take place.

Thus, increasing the temperature leads to an increase in the reaction rate.