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cp/Rgas = a0 + (a1/T2)×e-a2/T + a3×Y2 + [a4 - a5 /(T - a7)2]×Y8
|Y =||0,||T ≤ a7|
|(T - a7)/(T - a6),||T > a7|
where Rgas = universal gas constant
The basis for this functional form is discussed in .
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