I want to find the equation for momentum of gases in thermodynamics. Please help me . I need it urgently. Thanks

What do you believe the or even an "equation for momentum of gases" to be?

 

EDIT: Whatever: The average translational energy of a gas molecule is given by E = 3/2 kT, with k being the Boltzmann constant and T being the temperature. You directly get an average square of the momentum of such a gas molecule from that. That's probably towards what you think you meant.

Edited November 30, 201213 yr by timo

thanks. it's helpful

The Maxwell-Boltzmann speed distribution http://en.wikipedia.org/wiki/Maxwell%E2%80%93Boltzmann_distribution gives the average speed of the molecules of the gas fractions, and the molecular weight (molar mass) gives the mass, so then you have the momenta of the fractions.

The chart which includes X-axis{(speed) x (molecular mass) }and Y-axis{probability density} represents the closed value of the actual momentum distribution.

And, when you want the average value, the average momentum of molecules is useful.

Edited December 9, 201213 yr by alpha2cen