将质量为0.2kg的水加热，水的温度从20℃升高到40℃，水吸收的热量是多少？[c水＝4.2×103J／(kg·℃) ]

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将质量为0.2kg的水加热，水的温度从20℃升高到40℃，水吸收的热量是多少？[c_水＝4.2×10³J／(kg·℃) ]

上一题下一题 0.0难度选择题更新时间:2019-08-07 09:27:40

解：Q_吸=Cm△t = 4.2×10³J／(kg·℃)×0.2kg×20℃ =1.68×10⁴J

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