Question

Why equlibrium and all its principle are valid for gases ? No spam pls and google ans would be reported

Answer 1

Le Châtelier's principle (UK: /lə ʃæˈtɛljeɪ/, US: /ˈʃɑːtəljeɪ/), also called Châtelier's principle or "The Equilibrium Law", can be used to predict the effect of a change in conditions on some chemical equilibria. The principle is named after Henry Louis Le Châtelier and sometimes Karl Ferdinand Braun who discovered it independently. It can be stated as:

When any system at equilibrium for a long period of time is subjected to change in concentration, temperature, volume, or pressure, (1) the system changes to a new equilibrium and (2) this change partly counteracts the applied change.

It is common to treat the principle as a more general observation,  such as

When a settled system is disturbed, it will adjust to diminish the change that has been made to it,

or, “roughly stated”,

Any change in status quo prompts an opposing reaction in the responding system

or simply The System always kicks back.

The principle has a variety of names, depending upon the discipline using it (see homeostasis, a term commonly used in biology).

In chemistry, the principle is used to manipulate the outcomes of reversible reactions, often to increase the yield of reactions. In pharmacology, the binding of ligands to the receptor may shift the equilibrium according to Le Châtelier's principle, thereby explaining the diverse phenomena of receptor activation and desensitization.[2] In economics, the principle has been generalized to help explain the price equilibrium of efficient economic systems.

Phenomena in apparent contradiction to Le Châtelier's principle can arise in systems of simultaneous equilibrium: see the article on the theory of response reactions.