- #1
DanSandberg
- 31
- 0
The following is a direct quote from Cramer's Essentials of Computational Chemistry:
Assuming ideal gas statistical mechanics and pairwise additive forces, pressure P can be computed as
P(t)=[tex]\frac{1}{V(t)}[/tex]N(kb)(T(t))+(1/3)[tex]\sum\sumFF f(ij)r(ij)[/tex]
My question is: I've always been taught P=NkT/V, where does the second term derive from?
EDIT: The double summation in the second term is supposed to be F(ij)r(ij) where F is the force between particles i and j and r is the distance. N is the number of particles, kb is boltzmann, T is temperature, V is volume.
Assuming ideal gas statistical mechanics and pairwise additive forces, pressure P can be computed as
P(t)=[tex]\frac{1}{V(t)}[/tex]N(kb)(T(t))+(1/3)[tex]\sum\sumFF f(ij)r(ij)[/tex]
My question is: I've always been taught P=NkT/V, where does the second term derive from?
EDIT: The double summation in the second term is supposed to be F(ij)r(ij) where F is the force between particles i and j and r is the distance. N is the number of particles, kb is boltzmann, T is temperature, V is volume.