what is momentum of gases in thermodynamics

[Mr. Khan]

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

[timo]

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, 2012 by timo

[Mr. Khan]

thanks. it's helpful

[Wilmot McCutchen]

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.

[alpha2cen]

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, 2012 by alpha2cen