how we prove that b=4vm?
Answers
Answer:
b is the excluded volume in the Van der Waals equation. V must be the volume of a gas molecule and n the number of moles. The reason for the factor of 4 is here:
"In liquid state theory, the 'excluded volume' of a molecule is the volume that is inaccessible to other molecules in the system as a result of the presence of the first molecule.[1] The excluded volume of a hard sphere is eight times its volume—however, for a two-molecule system, this volume is distributed among the two particles, giving the conventional result of four times the volume;[2] this is an important quantity in the Van der Waals equation of state. The calculation of the excluded volume for particles with non-spherical shapes is usually difficult, since it depends on the relative orientation of the particles. The distance of closest approach of hard ellipses and their excluded area has been recently considered."
Explanation:
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