functionisobaricExpansionCoefficient
Return isobaric expansion coefficient (beta) as a function of the thermodynamic state record
Information
The isobaric expansion coefficient beta is defined as
1/v * der(v,T)
with v = 1/d, at constant pressure p.
Using the chain rule:
1/v * der(v,T) = d * (-der(d, T) / d^2) = -der(d, T) / d