The molar enthalpy of vaporisation of acetone is less than that of water. Why ?

Explanation

To explain why the molar enthalpy of vaporization of acetone is less than that of water, we can break down the solution into a few key steps:

### Step-by-Step Solution:

1. **Understanding Molar Enthalpy of Vaporization**:
- The molar enthalpy of vaporization is the amount of energy required to convert one mole of a liquid into vapor at constant temperature and pressure.
- It is an indication of the strength of intermolecular forces present in the liquid.

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