摘要
在1938年,Emden发表了一篇短文:“冬季为什么要生火?”。他将室内气体当作理想气体来处理,证明了生火使室内气体温度升高了,但没有改变室内气体的内能,气体的内能保持不变,这一结论很出乎内行人的意料,在此之后的学者也都是基于理想气体来研究这个问题。众所周知,范德瓦尔斯气体比理想气体更接近实际气体,如果将室内气体当作范德瓦尔斯气体来处理,却可得出如下的结论:生火后不但没有使室内气体内能增加,反而是略有减少的,这一结论可能更出乎内行人的意料。本文对该结论给出分析过程。
In 1938,Emden published a short article with the title,“Why do we have winter heating?”He treated indoor gas as ideal gas,and proved that the temperature of indoor gas was increased by heating,but the internal energy of indoor gas remained unchanged.This conclusion was quite unexpected for experts.After that,scholars have also studied this problem based on ideal gas.If the indoor gas is treated as van der Waals gas,which is closer to real gas than ideal gas as known,the following conclusion can be drawn:the internal energy of indoor gas does not increase but decreases slightly after heating,which may be more unexpected for experts.
作者
刘凤智
LIU Fengzhi(Department of Mechanical and Power Engineering,Yingkou Institute of Technology,Yingkou Liaoning 115014)
出处
《物理与工程》
2019年第3期94-96,共3页
Physics and Engineering
基金
营口理工学院资助基金(JG201608
JT201705)
关键词
内能
理想气体
范德瓦尔斯气体
温度
internal energy
ideal gas
van der Waals gas
temperature
