One suggestion for a simple pair potential is the triangular potential

Derive the second virial coefficient and fit the parameters σ, ε, and R to the virial coefficient data for argon tabulated in problem 7.30.

Data from Problem 7.30

The virial coefficient can be related to the pair potential by Eqn. 7.59.

(a) Derive the integrated expression for the second virial coefficient in terms of the squarewell potential parameters ε/k, σ, and R.

(b) Fit the parameters to the experimental data for argon

(c) Fit the parameters to the experimental data for propane.

Transcribed Image Text:

u(r) = ∞ for r< 0 and u(r) = 0 for r > Ro [(r/o) - R] 1-R u(r) = -ε -8 for o