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116问答网 > 为什么蒸发时吸热温度降低、沸腾时吸热温度不变？一定是这样的吗？？

为什么蒸发时吸热温度降低、沸腾时吸热温度不变？一定是这样的吗？？

2025-03-16 17:17:33

推荐回答（1个）

回答1：

蒸发吸热温度降低蒸发只在液体表面进行，液体表面的分子从液体内部吸收内能，具有更多内能的液表分子，就能克服其它分子的吸引，从液体中出来了。由于从液体内部吸热，液体温度降低。沸腾吸热，温度不变，吸收的能量使液态物质转化为气态物质了。

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