# What is the ideal gas law used for?

##### 1 Answer

Jun 7, 2018

see below

#### Explanation:

You can use one of two formulation of the ideal gas law according with what you want know.

where P = absolute pressure

V= volum

n = number of mol = mass (in gramms)/ molecular Mass

R is the universal costant of ideal gas = 0.082 L x Atm /(mol K) or 8,31 J /(mol K)

T = absolute temperature in K

This is usefull if you want find a parameter andyou know all the others

the second formulation is

it allows to see the change of a parameter (P, V or T) if you know the others