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About Chembase Structure
Chembase is a 
database file, filled with data from Yaws.
It has the following flexible structure:-
| Field |
Description |
Yaws Page |
| Name: |
The common name and chemical formula |
669 |
| CAS#: |
An eight digit CAS number |
669 |
| Comment: |
This memo field can contain anything the user requires.
"Structure sketch", "Synonyms", "Demand", "Price",
"Uses" and "Characteristics" are standard
subheadings |
|
| Molwt: |
Molecular weight [g/mol] |
1 |
| TfTb: |
Tf, Temperature of freezing [ºK]
Tb, Temperature of boiling [ºK] |
1 |
| Crit Props: |
Critical properties, Tc, Critical temperature [ºK]
Pc, Critical pressure [bar]
Vc, Critical volume [cm³?mol]
Zc, Critical compressibility
omega. acentric factor |
1 |
| Gas Cp: |
*Ideal gas isobaric heat capacity [J/mol.ºK], #,
A, B, C, D, E, Tmin, Tmax |
30 |
| Liq Cp: |
*Liquid heat capacity [J/mol.ºK], #, A, B, C, D,
E, Tmin, Tmax |
|
| Heat Vap: |
*Enthalpy of vaporization [J/mol.ºK],
#, A, B, C, D, E, Tmin, Tmax |
56 |
| Vap Pres: |
*Vapour pressure [mm Hg], #, A, B, C, D, E,
Tmin, Tmax |
159 |
| Liq dens: |
*Liquid density [g/ml], #, A, B, C, D, E, Tmin,
Tmax |
185 |
| Surf Ten: |
*Surface tension [dyne/cm], #, A, B, C, D,
E, Tmin, Tmax |
212 |
| RIdmRG: |
Refractive index
Tref, refractive index reference temperature [ºK]
Dipole moment [debye]
Radius of gyration [Amstrom] |
239 |
| Hform: |
*Enthalpy of formation [kJ/mol], #, A, B, C, D,
E, Tmin, Tmax |
288 |
| Genergy: |
*Gibbs free energy of formation [kJ/mol], #, A,
B, C, D, E, Tmin, Tmax |
314 |
| Gas Vis: |
*Ideal gas viscosity [µP], #, A, B, C, D,
E, Tmin, Tmax |
452 |
| Liq Vis: |
*Liquid viscosity [cP], #, A, B, C, D, E, Tmin,
Tmax |
478 |
| Gas Cond: |
*Gas thermal conductivity [W/m.ºK], #, A, B, C,
D, E, Tmin, Tmax |
505 |
| Liq Cond: |
*Liquid thermal conductivity [W/m.ºK], #, A, B,
C, D, E, Tmin, Tmax |
531 |
*Equation types
| No |
Type |
| 1 |
Y=A×TB |
| 2 |
Y=A +B×T +C×T² +D×T³ + E×T4 |
| 3 |
log10(Y)=A +B/T +C×T +D×T² + E×T3 |
| 4 |
log10(Y)=A +B/T +C×log10(T) +D×T +
E×T² |
| 5 |
log10(Y)=A +B×(1-T/C) |
| 6 |
Y=A +B×(1-T/C) |
| 7 |
Y=A×(B^(-1-T/C)D) |
|
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