Physical property data bank

Inorganic compounds are listed in alphabetical order of the principal element in the empirical formula. 

Organic compounds with the same number of carbon atoms are grouped together, and arranged in order of the number of hydrogen atoms, with other atoms in alphabetical order. 

DELHF = Standard enthalpy of formation of vapour at 298 K, kJ/mol. DELGF = Standard Gibbs energy of formation of vapour at 298 K, kJ/mol. 

CPVAPA, CPVAPB, CPVAPC, CPVAPD = Constants in the ideal gas heat capacity equation  

ANTC = Constants in the Antione equation  

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In a sequential-modular program the executive program sets up the flow-sheet sequence, identifies the recycle loops, and controls the unit operation calculations interacting with the unit operations library, physical property data bank and the other sub-routines. It will also contain procedures for the optimum ordering the calculations and routines to promote... 

In an equation based simulators the executive program sets up the flow-sheet and the set of equations that describe the unit operations, and then solves the equations taking data from the unit operations library and physical property data bank and the file of thermodynamic sub-routines. 

Where values cannot be found, the data required will have to be measured experimentally or estimated. Methods of estimating (predicting) the more important physical properties required for design are given in this chapter. A physical property data bank is given in Appendix C. 

All design studies require physical property data and the efficient use of CAD methods means that this data must be available in a convenient form for computer use. Data in the form of graphs or tables is of limited use, although some data banks do contain only measured data. A more useful form of data storage is to correlate the available data and then store the calculated parameters required for use in appropriate empirical equations (stating the limits over which the correlations apply). Some data banks contain only the calculated parameters whereas others also store the available raw data. The following are examples of some common physical property data banks ... 

D8. Use the Wilke-Chang theory to estimate the infinite dilution Fickian diffusivity of methanol in liquid water at 293.16 K. Data are available at http //www.engineeringtoo1box.com/ and http //www.cheric.org/research/kdb/ (click on Korean Physical Properties Data Bank). 

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