the substance air
(Forall (?Self ?Time)
(=> (Active ?Time Air ?Self)
(And (= (Lambda (?T)
(If (= ?T ?Time)
(Value-At (Molecular-Weight ?Self)
?T)))
28.97)
(= (Lambda (?T)
(If (= ?T ?Time)
(Value-At (Critical-Temperature ?Self)
?T)))
133)
(= (Lambda (?T)
(If (= ?T ?Time)
(Value-At (Critical-Pressure ?Self)
?T)))
37.7)
(= (Lambda (?T)
(If (= ?T ?Time)
(Value-At (Ideal-Gas-Constant ?Self)
?T)))
286.99))))
(Forall (?Self ?Time)
(<=> (Active ?Time Air ?Self)
(And (Air ?Self) (Active ?Time Substance ?Self))))