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用温度计测量酒精的体积膨胀系数 被引量:1

Measuring the volume expansion coefficient of alcohol
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摘要 温度计毛细管中酒精的长度变化ΔL1与温度改变ΔT1成正比,通过拟合ΔL1-ΔT1获得斜率S1,由已知毛细管的横截面积A1和酒精初始体积V1,计算得到酒精的体积膨胀系数.对于毛细管的横截面积和酒精初始体积未知的温度计,可以更换不同量程和精度的温度计,拟合ΔL2-ΔT2获得斜率S2,拟合ΔL1-ΔL2获得斜率S3,由S2,S3,V1和A1计算得到酒精的体积膨胀系数. The length variations ΔL1 of the alcohol of thermometer capillaries were proportional to the temperature variations ΔT1.The gradient S1 could be obtained by fitting the ΔL1-ΔT1 data.The volume expansion coefficient could be calculated based on the cross-sectional area A1 and the initial volume V1 of the alcohol.For the capillaries whose crosss-ectional area and initial alcohol volume were unknown,the gradient S2 could be obtained by fitting ΔL2-ΔT2 data,and S3 by fitting ΔL1-ΔL2 data by choosing thermometers with different ranges and precisions.The volume expansion coefficient could be given by calculation dependent on the factors S2,S3,V1 and A1.
作者 罗倩 张皓晶 LUO Qian;ZHANG Hao-jing(College of Physics and Electronic Information,Yunnan Normal University,Kunming 650500,China)
出处 《物理实验》 2020年第9期61-63,共3页 Physics Experimentation
关键词 体积膨胀系数 线性拟合 温度计 酒精 volume expansion coefficient linear fitting thermometer alcohol
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