Subject: Re: CCL:function to calc. Cp of C12H26

From: "William R. Smith" <[email-masked]>
Date: Wed, 14 Aug 1996 15:11:06 EDT

Hobina Rajakaruna asked:
>
> Can some one provide me with a function to calculate
> isobaric specific heat capacity of C12H26  as in the
> form: aT+bT2+cT3... accurate between  700K-3000K

For n-dodecane (C12H26) in the IG state:

(this representation is usually more efficient than using polynomials)

Cp = A + B*(C/T/sinh(C/T))^2 + D*(E/T/cosh(E/T))^2 (in J/kmol/K)

A = 2.1295E+05
B = 6.6330E+05
C = -1715.5
D = 4.5161E+05
E = -777.5

valid over 200K - 1500K, accurate to within 1% (graph it - you might be able
to extrapolate to higher T values)

Best Regards,

W. R. Smith                        Professor
                                   Dept. of Mathematics and Statistics
                                   and School of Engineering 
                                   University of Guelph
FAX: 519-837-0221                  Guelph, Ontario
Tel: 519-824-4120, ext. 3038       CANADA N1G 2W1