What is the approximate relationship between the heat of vaporisation and the boiling point of a liquid?

Explanation

To determine the approximate relationship between the heat of vaporization and the boiling point of a liquid, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Heat of Vaporization**:
- The heat of vaporization (ΔH_vap) is the amount of energy required to convert a unit mass of a liquid into vapor without a change in temperature.

2. **Understanding Boiling Point**:
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