令人涼快的...(物理)

Actually, this is a question concerning heat conduction and also latent heat of vaporisation.

For ice water, the temperature is much lower than your body temperature, so heat is transferred from your body to the ice water until they are at the same temperature.

For 白花油, on the other hand, it evaporates very easily and requires latent heat of vaporisation. So, it absorbs heat energy from your body and lowers your body temperature.

That's why ice water and 白花油 make you feel cool.

Hope this can help you^.^

冰水令人感到涼快的原因是通過溫差，人體將熱傳給了冰水。

白花油令人感到涼快的原因是白花油成分中有酒精之類容易揮發的溶劑，液體揮發（蒸發）時需要吸收熱量，so......

冰水令人涼快的解釋很容易，因為它是冷的
熱的物質容易被冷的物質吸收，所以會涼快
白花油的主要成份是薄荷冰 ,冬青油同樟腦
薄荷冰是由薄荷醇提煉的,所以比較清涼

冰水是直接拿走熱能，
白花油的沸點很低，當蒸發時需要從附近吸取能量，所以一樣可以令到冰涼。

冰水係因為溫度低,所以直接conduct左人ge熱,人ge熱conduct左去冰水,導致loss of heat,咁就feel到涼快la.....
而白花油係易揮發ge liquid,佢evaporates做gas個時吸左熱黎evaporate,令到人搽左易花油個部分average kinetic energy下降,個部分溫度也相繼下降,so feel到涼快.......