### Functions for Lee-Kesler method

These functions compute the thermodynamic properties of chemicals by using reduced pressure and temperature. When you activate LKXL.XLA, you have access to these functions. By pressing fx button in MS Excel a dialog over all function comes up. Select "User Defined" and you will have a list over all user defined functions. When you pick a function, a brief description of the function appears at the bottom of the dialog box. If you press "Next", Excel will continue with a dialog box that asks for the necessary inputs for the function. In case, you press "Enter" button, you should fill all the parameters with numbers, cell reference, variable name and so on. These are the normal Excel functions behavior and is not specific for this program. If you need more help please see the on-line help of MS Excel or the user manual. The function names are compatible with the DLL version of steam properties. Those users who upgrade to this version from DLL version of steam properties will find several new functions. There are some simple rules that will help you to remind function names. Here, you have a complete list of functions. A print of this page will be helpful if you are new to this package.

Function | Description
FluidIndex | Fluid index in DB (Obsolete)
DBTfb | Normal freezing point (Obsolete)
DBTb | Norma boiling point (Obsolete)
DBTc | Critical temp. (Obsolete)
DBPc | Critical pressure (Obsolete)
DBVc | Critical specific volume (Obsolete)
DBZc | Critical compressibility factor (Obsolete)
DBAF | Pitzer's acentric factor (Obsolete)
DBDM | Dipole moment (Obsolete)
DBDELHF | Standard enthalpy of formation (Obsolete)
DBDELGF | Standard Gibbs energy of formation (Obsolete)
LKPFT | (P,F)->T, reduced temperature
LKPHT | (P,H)->T, reduced temperature
LKPQF | (P,Q)->F, fugacity-pressure ratio
LKPQH | (P,Q)->H, residual enthalpy
LKPQS | (P,Q)->S, residual entropy
LKPQZ | (P,Q)->Z, compressibility factor
LKPST | (P,S)->T, reduced temperature
LKPZT | (P,Z)->T, reduced temperature
LKPT | (P)->T, reduced saturation temperature
LKPTF | (P,T)->F
LKPTH | (P,T)->H
LKPTS | (P,T)->S
LKPTZ | (P,T)->Z
LKTP | (T)->P, reduced saturation pressure
LKTQF | (T,Q)->F
LKTQH | (T,Q)->H
LKTQS | (T,Q)->S
LKTQZ | (T,Q)->Z

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