The Degrees of freedom of the gaseous molecule
(1) The motion of atoms and molecules is generally described in terms of the degree of freedom which they possess.
(2) The degrees of freedom of a molecule are defined as the independent number of parameters required to describe the state of the molecule completely.
(3) When the gaseous molecule is heated up, the energy supplied to it might bring about three kinds of the motion in it, these are,
(i) The translational motion (ii) The rotational motion (iii) The vibrational motion.
This can be obtained by saying that the molecule possesses translational, rotational and vibrational degrees of freedom.
(4) For a molecule made up of N atoms, total degrees of freedom = 3N. Further split up of these is as follows,
Translational Rotational Vibrational
For linear molecule : 3 2 3N - 5
For non-linear molecule : 3 3 3N - 6
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