The mean speed of the molecules of an ideal gas is − 3 1 2.0 10 ms .The radius
of a gas molecule is − 10 1.5 10 m.Calculate the (i) collision frequency, and
(ii) mean free path. It is given that n = 4 1024 m^−3.
"<v>=312(m\/s)"
"n=4\\cdot10^{24}(1\/m^3)"
"r=1.5\\cdot10^{-10}(m)"
(i) "<z>=4\\sqrt2\\pi n r^2\\cdot<v>="
"=4\\cdot\\sqrt2\\cdot3.14\\cdot4\\cdot10^{24}\\cdot(1.5\\cdot10^{-10})^2\\cdot312="
"=500\\cdot 10^6(collision\/s)"
(ii) "<\\lambda>=\\frac{<v>}{<z>}=\\frac{312}{500\\cdot10^6}=624\\cdot10^{-9}(m)"
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