测量液体膨胀系数的新方法

A New Method for Measuring the Coefficient of Expansion of Liquid

液体膨胀系数是指温度每改变1摄氏度时,其体积的变化和它在0℃时体积之比。本文自组了测量液体膨胀系数的实验装置,将毛细管与感温泡组装成实验用的感温液体的容器,再用恒温水浴锅作为改变液体温度的设备,记录实验数据,处理数据,得出水和乙醇的膨胀系数。实验结论对温度计的设计与校准有重要的参考作用。实验结果与标准值相比较误差分别为2.9%和3.0%,相对误差小,说明该实验方案可行。

The coefficient of liquid expansion is the ratio of the volume change to its volume at 0℃for every 1 degree Celsius change in temperature.In this paper,the experimental device for measuring the liquid expansion coefficient is assembled.The capillary and the temperature sensitive bubble are assembled into a container for the temperature sensitive liquid for experiment.Then,the constant temperature water bath is used as the device for changing the temperature of the liquid,the experimental data is recorded,the data is processed,and the water is obtained.And the coefficient of expansion of ethanol.The experimental conclusion has an important reference for the design and calibration of the thermometer.The error between the experimental results and the standard values is 2.9%and 3.0%,respectively,and the relative error is small,indicating that the experimental scheme is feasible.