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想知道为什么水在0℃～4℃范围内冷胀热缩吗?让我们一起聆听金教授的讲解吧.我们知道,在一般情况下,当物体的温度升高时,物体的体积会膨胀,于是它的密度减小,也就是通常所谓的热胀冷缩.图1表示具有一定质量的水的体积V和温度T的关系.从图中可以看出,4℃以上的水,具有热胀冷缩的特性.但在0℃～4℃范围内,随温度T升高,水的体积却减小,即密度增大,呈现出冷胀热缩的特性.水的这种“反常现象”如何来解释呢?物质的密度由其内的分子(或原子)间的
Would like to know why the water in the 0 ℃ ~ 4 ℃ range of expansion and contraction? Let us listen to Professor Jin explain it. We know that in general, when the temperature of the object increases, the volume of objects will be expanded, So its density is reduced, that is, the so-called thermal expansion and contraction.Figure 1 shows a certain mass of water volume V and temperature T. It can be seen from the figure, 4 ℃ above the water, with thermal expansion But in the range of 0 ℃ ~ 4 ℃, with the increase of temperature T, the volume of water decreases, that is, the density increases, showing the characteristics of cold expansion and contraction. This “anomalous phenomenon of water ”How to explain it? The density of matter by its molecules (or atoms) between