Mr. Khan Posted November 30, 2012 Share Posted November 30, 2012 I want to find the equation for momentum of gases in thermodynamics. Please help me . I need it urgently. Thanks Link to comment Share on other sites More sharing options...
timo Posted November 30, 2012 Share Posted November 30, 2012 (edited) 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 Link to comment Share on other sites More sharing options...
Mr. Khan Posted December 1, 2012 Author Share Posted December 1, 2012 thanks. it's helpful Link to comment Share on other sites More sharing options...
Wilmot McCutchen Posted December 2, 2012 Share Posted December 2, 2012 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. Link to comment Share on other sites More sharing options...
alpha2cen Posted December 9, 2012 Share Posted December 9, 2012 (edited) 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 Link to comment Share on other sites More sharing options...
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