At higher temperatures the equation of state becomes better and better approximated by the "perfect gas" law.

在更高的温度区内，状态方程越来越接近于“理想气体”定律。

youdao

The state function, entropy, is introduced by the means of a perfect gas behavior, and the second law of thermodynamics is demonstrated based on the first law.

本文以理想气体的行为为手段引出熵函数，并以热力学第一定律为基础，论证了熵增大原理。

youdao