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缓冻秋梨为什么要用凉水

更新时间: 2020-09-26 00:00:00     

将冻秋梨放在冷水中,由于冻秋梨的温度低于水,冻秋梨吸热,冷水放出热量从而变成冰。当冰的厚度不再增加时,说明冻秋梨与水都达到了零摄氏度,冻秋梨己化开。

如果将冻秋梨放在热水中浸泡,热水很容易将冻秋梨外表烫熟。烫熟的外表是热的不良导体,不易进行传热,冻秋梨内部难以解冻。

关键词: 为什么 凉水

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