H=a(T-T0)+b(T^2-T0^2)/2-c(1/T-1/T0)
the constants a,b,c and the mass fraction of air constituents are provided
T0=273k
T=288k
i did apply in the equation as in the attached sheet
by sum the last column i got this value for enthalpy, the book says the enthalpy is 14.876 kj/kg
any idea
thanks in advance
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Edited by slmn, 09 April 2012 - 02:18 PM.