Editing Second virial coefficient
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The second virial coefficient, in three dimensions, is given by | The second virial coefficient, in three dimensions, is given by | ||
:<math>B_{2}(T)= - \frac{1}{2} \int \left( | :<math>B_{2}(T)= - \frac{1}{2} \int \left( \left\langle \exp\left(-\frac{\Phi_{12}({\mathbf r})}{k_BT}\right)\right\rangle -1 \right) 4 \pi r^2 dr </math> | ||
where <math>\Phi_{12}({\mathbf r})</math> is the [[intermolecular pair potential]], ''T'' is the [[temperature]] and <math>k_B</math> is the [[Boltzmann constant]]. Notice that the expression within the parenthesis | where <math>\Phi_{12}({\mathbf r})</math> is the [[intermolecular pair potential]], ''T'' is the [[temperature]] and <math>k_B</math> is the [[Boltzmann constant]]. Notice that the expression within the parenthesis | ||
of the integral is the [[Mayer f-function]]. | of the integral is the [[Mayer f-function]]. | ||
==Isihara-Hadwiger formula== | ==Isihara-Hadwiger formula== | ||
The Isihara-Hadwiger formula was discovered simultaneously and independently by Isihara | The Isihara-Hadwiger formula was discovered simultaneously and independently by Isihara |