天气预报 > 生活 > 火上浇油是化学变化吗
火上浇油是化学变化吗
更新时间: 2019-06-06 00:00:00  

浇油动作是物理变化,油燃烧时是化学变化。火上浇油的化学原理:增加燃料使其燃烧更为充分,油是液态高级脂肪酸甘油酯,可以与氧气燃烧生成二氧化碳和水。现实生活中,“火上浇油”也能起到灭火的作用。原理是在油锅着火时,用低温油对高温油进行覆盖,高温油遇到低温油后,能够迅速降低油锅内的温度,从而达到灭火效果。

关键词: 火上浇油 化学变化

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