Ideal gas

From GAWDAwiki

An ideal gas can be simply defined as a gas (or liquid) that obeys the ideal gas equation p=rho.R.T. All gases under low pressure (compared to the critical pressure) and/or high temperature (about 250K or more) can usually be treated as ideal gases. ^[1]

An ideal gas is one in which all collisions between atoms or molecules are perfectly elastic and in which there are no intermolecular attractive forces. One can visualize it as a collection of perfectly hard spheres which collide but which otherwise do not interact with each other. In such a gas, all the internal energy is in the form of kinetic energy and any change in internal energy is accompanied by a change in temperature.^[2]

References

1. http://test.sdsu.edu/testhome/javaapplets/idealgas-mixture/index.html
2. http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/idegas.html