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刚烧开的水有多少度
更新时间: 2020-07-15 00:00:00  

标准大气压下是100度,但是在高海拨地区,比如西藏,由于气压低,可能只有只七十至八十度。

水烧开跟水的沸点有关,标准大气压下,水的沸点是100度,水的沸点跟外部压强有关。当水所受的压强增大时,它的沸点升高;压强减小时;沸点降低。例如,蒸汽锅炉里的蒸汽压强,约有几十个大气压,锅炉里的水的沸点可在200度以上。又如,在高山上煮饭,水易沸腾,但饭不易熟。这是由于大气压随地势的升高而降低,水的沸点也随高度的升高而逐渐下降。

关键词: 多少

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