热水比冷水灭火效果好 episode artwork

EPISODE · Nov 1, 2021 · 1 MIN

热水比冷水灭火效果好

from 伊人耳朵SPA/一分钟耳朵SPA

在日常生活中如果家里着火了,不要惊慌失措,用水及时浇灭就行。但是,在着火时,我们不免会思考是用热水灭火好还是用冷水灭火好呢?根据我们了解的一般常识,用冷水灭火效果更好,因为冷水可以迅速降低火的温度。的确,冷水灭火很好,但是要想更有效地灭火,最好使用热水。物体要想着火必须满足三个条件:一是达到着火点;二是火源;三是有充足的空气。因此,要想把火扑灭,就得从这三个方面来加以遏制。冷水可以达到降低着火点的目的,但是另外两个条件却无法阻止。而用热水灭火,热水能在短时间内迅速汽化,产生水蒸气,把火源覆盖,使火源得不到充足的氧气而无法燃烧,所以,热水能够从两个方面来遏制火势的发展。不过还是要注意,生活中一定要小心用火。虽然热水灭火效果好,但要想在危急时刻得到大量的热水来灭火是非常困难的事情哦!

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热水比冷水灭火效果好

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