The rates of most reactions double when their temperature is raised from 298 K to 308 K. Calculate their activation energy.

Explanation

To calculate the activation energy (Ea) for a reaction where the rate doubles when the temperature is raised from 298 K to 308 K, we can use the Arrhenius equation and the concept of rate constants at different temperatures.

### Step-by-Step Solution:

1. **Understand the Problem**:
We know that the rate of a reaction doubles when the temperature increases from 298 K to 308 K. We need to find the activation energy (Ea) for this reaction.

2. **Use the Arrhenius Equation**:
...