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Chemistry of Life
Water Phase Changes and Ice Density
Description
Water changes between solid, liquid, and gas states as temperature and molecular motion change. In this lesson, the focus is on how water freezes, melts, vaporizes, and returns to liquid or solid form. The balance between intermolecular forces, which pull molecules together, and kinetic energy, which pushes them apart, contr...
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Transcript
许多物质,就像水,
一般被发现于这三种状态
固体,液体,或者气体;这取决于
分子之间的吸引力关系
以及他们的动能
打个比方,水在温度降到0摄氏度
或者更低时
水就变成了固态,冰
氢键在分子之间形成
形成了一种格子型的结构
通过升温
动能被重新引入
许多键现在固体与液体的熔点
开始分离
在这个阶段,分子在不断地相互组成
并相互分离
将温度升至100摄氏度或者更高
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