Explanation:

* Heat of Vaporization: The heat of vaporization is the amount of heat energy required to change a substance from a liquid to a gas at a constant temperature. Ether has a much lower heat of vaporization than water.

* Evaporation Rate: Due to its lower heat of vaporization, ether evaporates much faster than water. This rapid evaporation absorbs a significant amount of heat from the surroundings, causing a cooling effect.

* Volatility: Ether is more volatile than water, meaning it readily transitions from a liquid to a gas at room temperature. This volatility contributes to its faster evaporation rate.

Practical Example:

If you were to apply a small amount of ether and water to your skin, you would feel a much more pronounced cooling sensation from the ether. This is because the ether evaporates rapidly, taking heat away from your skin.

Conclusion:

The lower heat of vaporization and higher volatility of ether make it a more effective cooling agent than water.