# What Is an Ideal Gas?

An ideal gas is a theoretical gas that is composed of a set of randomly-moving, non-interacting point particles. It can be characterized by 3 state variables: absolute pressure (P), absolute temperature (T) and volume (V).
ideal gas - Definition
(n.) Gas composed of molecules on which no forces act except upon collision with one another and with the walls of the container in which the gas is enclosed; gas that obeys the ideal gas law
Source: Dictionary.com
An ideal gas is a hypothetical gas that is composed of a group of non-interacting point particles. An ideal gas can be characterised by three state variables which are: absolute pressure (P), volume (V), as well as absolute temperature (T).
An ideal gas is one with point-like, non-interacting molecules of negligible size that exert no intermolecular forces. However the molecules are allowed to be poly-atomic, and so have internal degrees of freedom
An ideal gas is a theoretical gas composed of a set of randomly moving, non interacting point particles. The ideal gas concept is useful because it obeys the ideal gas law.
An ideal gas is one that contains atoms or molecules that collide with perfect elasticity and have no other form of interaction besides that collision You can find more information here: http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/idegas.html
Q&A Related to "What Is an Ideal Gas"
 The ideal gas law would be that it's against the law to charge us for gas. The ideal gas law is the equation of state of a hypothetical ideal gas. The concept came to light in 1834! http://answers.ask.com/Science/Physics/what_is_the...
 Ideal Gas is imaginary gas which obeys Gas Law PV=nRT at all temperatures and pressures. Such gas don't exists in real but Inert/Noble gases follow law with greater extent. http://answers.ask.com/Science/Physics/what_is_an_...
 For an ideal gas two conditions are necessary, 1- its molecules should volume less and 2- there is no force of attraction among its molecules, both these conditions are impossible http://wiki.answers.com/Q/Why_there_is_no_ideal_ga...
 1. Subtract the partial pressure of oxygen in the air, which will be around 107 mm Hg, from the prevailing atmospheric pressure (generally 760 mm Hg) Multiply this result by the fraction http://www.ehow.com/how_10046167_calculate-ideal-a...
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