AL physics問題,,煩請高手幫幫手

The first assumption implies that there are negligible interactions between the gas molecules, and the second assumption implies that the volume of the gas molecules is negligible.

An ideal gas is a gas that the gas molecules have zero volume and there are no interactions between them. Actually, no real gas is ideal gas. However, if the two assumptions hold for a real gas, the real gas is close to ideal and all the laws of ideal gas (e.g. PV = nRT) can be used.

2010-04-20 01:06:23 補充：
不是有什麼用，而是 ideal gas 的基本設定。

因為 collision 佔的時間很短，即大部份時間 moleecules 間的 average distance 較長，所以粒子間的 interactions 可以 negligible。