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Tuesday, 14 March 2017

Kinetic theory of gases - V



Internal Energies & specific heats of monoatomic, diatomic& polyatomic

gases:
1. If ‘f’ is degree of freedom then for a gas of polyatomic molecules energy
associated with 1 mole of gas,
2. For a monoatomic gas f=3,

3. For a diatomic gas with no vibrational mode f=5, so

4. For a diatomic gas with vibrational mode f=7, so

Meanfree path: It is the average distance covered by a molecule between two
successive collisions. It is given by,

Where,n is no. density and ‘d’ is diameter of the molecule.
Brownian Equation :-The zig-zag motion of gas molecules is Brownian motion
which occurs due to random collision of molecules.

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