Rate of reaction increases:
Increasing the temperature of a reaction generally increases the rate of the reaction. This is due to the following reasons:

1. Collision Theory:
According to the collision theory, for a reaction to occur, the reactant particles must collide with sufficient energy and proper orientation. Increasing the temperature increases the kinetic energy of the particles, leading to an increase in the number of collisions between reactant particles. This increases the chances of successful collisions and, therefore, increases the rate of reaction.

2. Activation Energy:
The activation energy is the minimum energy required for a reaction to occur. By increasing the temperature, the average kinetic energy of the reactant particles increases. As a result, more particles possess energy greater than the activation energy, allowing them to overcome the energy barrier and participate in the reaction. This leads to an increase in the rate of reaction.

3. Collision Frequency:
Increasing the temperature also increases the average speed of the reactant particles. The higher speed leads to an increase in the collision frequency between the reactant particles. As a result, the reactant particles collide more frequently, increasing the chances of successful collisions and hence, increasing the rate of reaction.

4. Reaction Rate Constant:
The rate constant of a reaction is a measure of the speed at which the reaction takes place. The rate constant is generally temperature-dependent and increases with an increase in temperature. Therefore, increasing the temperature increases the rate constant, resulting in an overall increase in the rate of reaction.

5. Reaction Kinetics:
The reaction kinetics, which describe the rate of reaction, are influenced by temperature. For many reactions, an increase in temperature leads to an increase in the reaction rate. This is evident from the Arrhenius equation, which shows that the rate constant of a reaction is exponentially dependent on temperature.

In conclusion, increasing the temperature of a reaction generally leads to an increase in the rate of reaction. This can be attributed to an increase in collision frequency, collision energy, and the number of reactant particles possessing sufficient energy to overcome the activation energy barrier.