Can a reaction have negative activation energy?

Explanation

### Step-by-Step Solution

1. **Understanding Activation Energy (Ea)**:
- Activation energy is defined as the minimum amount of energy required for a chemical reaction to occur. It is a crucial concept in chemical kinetics as it determines the rate at which a reaction proceeds.

2. **Behavior of Reactions with Temperature**:
- Generally, as temperature increases, the kinetic energy of molecules also increases. This leads to more frequent and effective collisions between reactant molecules, which typically results in an increased rate of reaction. Therefore, for most reactions, the activation energy is positive.

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