八年级物理上册第三章第三节汽化和液化探究水沸腾的特点—实验报告素材(新版)新人教版.doc

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1水的沸腾 实验报告班级: 姓名: 实验目的:观察水沸腾时的现象实验器材:铁架台、酒精灯、火柴、石棉网、烧杯、温度计、水、秒表 实验装置图:实验步骤:1.按装置图安装实验仪器,向烧杯中加入温水。2.用酒精灯给水加热并观察.(观察水的温度变化,水中的气泡变化)3.当水温达到 90时开始计时,每 30 秒记录一次温度,填入下表中。实验记录表:时间(分) 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5温度() 90.气泡变化 沸腾前 沸腾时4、实验结果分析:以时间为横坐标,温度为纵坐标,根据记录用描点法作出水的沸腾图像。5、分析和 总结实验(1)沸腾后移走酒精灯,沸腾是否继续进行?观察温度计示数及现象,说明沸腾需要什么条件?(2)思考并分析归纳水沸腾时的特点。(3)实验过程中的发现和疑问。

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