用电加热方法测量液氮的汽化潜热  

Measuring the latent heat of vaporization of liquid nitrogen using electric heating method

作　　者：汪六九[1] 何春娟[1] 王云[2] 赵铁松[1] 

机构地区：[1]中国人民大学物理学系,北京100872 [2]北京化工大学物理系,北京100029

出　　处：《物理实验》2010年第1期33-35,共3页Physics Experimentation

摘　　要：对测量液氮汽化潜热实验进行改进,引入计算机数据采集技术,记录液氮的汽化过程,通过浸入液氮中的通电电阻释放热量,来改善汽化程度,这样既可以长时间地观察液氮的汽化过程,又能较准确的测量汽氮汽化潜热.The experiment of latent heat of vaporization of liquid nitrogen is improved by that the vaporization process of liquid nitrogen is recorded by computer, and the vaporization speed of liquid nitrogen is controlled by resistor merged in the liquid nitrogen. Therefore, the vaporization process of liquid nitrogen could be recorded for a long time; ＂the latent heat of vaporization of liquid nitrogen could be measured more accurately.

关 键 词：液氮 汽化潜热 数据采集 电加热法 

分 类 号：O551.3[理学—热学与物质分子运动论] O4-39[理学—物理]