THE van der WAALS EQUATION: INTERPRETATION
(p + a/v2)(v - b) = rT ?(P,V,t,a,b,r) = 0
AS ENCODINGS OF A NATURAL SYSTEM, THEY HAVE
THE PARAMETERS, a,b, AND r IDENTIFY THE
PARTICULAR SPECIES OF GAS (GENOTYPE)
p, T ARE THE ENVIRONMENT OF THE SYSTEM
AT EQUILIBRIUM, v IS DETERMINED BY THE
EQUATION WHEN GENOTYPE AND ENVIRONMENT
ARE SPECIFIED ( PHENOTYPE)