用压力传感器和温度传感器测量绝对零度

Measurement of absolute zero degree using pressure sensor and temperature sensor

介绍用贮气球体与压力传感器和温度传感器配合,在定容条件下测量气体的压强与温度,采用外推法估算理想气体可以达到的最低温度,即绝对零度的摄氏温度值,替代原先用玻璃管测体积和水银温度计测温度.使用这种绝对零度实验装置,可以更明显地观察分析热力学现象,并使测得的绝对零度值较为精确.

A concert between the pressure transmitter and the temperature sensor by using the air bottle is introduced. The pressure and temperature of the gas under the condition of equal volume are measured. By using the extend method, one can estimate the lowest temperature （ i. e. , the absolute zero degree） of the ideal gas. By substituting the original glass tube for measuring the volume and the mercury thermometer measuring the temperature, we use a new experimental installation for measuring the absolute zero degree. Thermodynamics phenomenon can be observed obviously and the value of absolute zero degree can be observed accurately.