點解有D物質會有揮發性o既???

點解有D物質會有揮發性o既???
因為這些物質之間的吸引力比較其它的弱,也即是說,它們之間只有van der waal's forces來圍系,而非較強的氫鍵(Hydrogen bonds)就會有會有揮發性
For examples, ethanoic acids molecules link together by dimerization (a kind of hydrogen bonds ), water molecules link together by hydrogen bonds also and short carbon chain alkanol molecules also link together by hydrogen bond. This bond prevents them evaporating at fast rate at room temperature . Hence they are less violatile.
揮發左=無左??? 不是的,因為根據質量守恒定律,它沒有消化到(無左),只是化為空氣中的氣體,但是由於詃物體可能是無色的,所以你見不到.
希望你明白.

those matter have low boiling point. When placed in air, some molecules can gain enough energy for vapourization to occur. Therefore they are colatile