**n-OCTANE**

n-OCTANE provides high accuracy thermodynamic properties for normal octane (Molar mass =114.231 g/mole) using the Fundamental Equation of State, as described by:

Span, R. and Wagner, W.

"Equations of State for Technical Applications: II Results for Non-Polar Fluids"

Int. J. of Thermophysics, Vol. 24, No. 1, Jan. 2003

__The specific heat of n-octane in the ideal gas state is determined from:__

Jaeschke and Schley

Ideal-Gas Thermodynamic Properties for Natural-Gas Applications

International Journal of Thermophysics, Vol. 16, No. 6, 1995, pp. 1381-1392

**Reference State **

** ** h = 0 kJ/kg, s = 0 kJ/kg-K at 298.15 K, 101.325 kPa. The reference state can be changed using the $Reference directive.

**Range of applicability for equation of state**:

216.37 K < T < 750 K

0 < P <100 MPa

__Thermal conductivity and viscosity correlations were fit to tabular data provided in:__

*"Properties of Inorganic and Organic Fluids"*

Edited by C.Y. Ho

Authored by: P.E. Liley, T. Makita, and Y. Tanaka.

CINDAS Data Series of Material Properties, Vol V-1

Hemisphere Publishing Corporation

Chapter 25 - n-Octane

__Range of applicability for transport function correlations:__

Gas-phase viscosity: 250 K to 550K

Liquid-phase viscosity: 216 K to 500 K

Gas-phase thermal conductivity: 300 K to 650 K

Liquid-phase thermal conductivity: 200 K to 525 K

__Surface tension data are provided through a correlation developed by:__

G.R. Somayajulu

"A Generalized Equation for Surface Tension from the Triple Point to the Critical Point"

International Journal of Thermophysics, Vol. 9, No. 4, 1988