PHYSICAL DATA HELP
Displays,calculates chemical/physical properties of 481 chemical compounds.
Method of Operation :
Select the required compound from the drop down list box,its
properties will then be shown.(type in directly in the compound to search for a coumpound,matching items will be displayed in list.)
Heat Temp.,VP. Temperature :- Temperature
values used too calculate the heat capacity, Vapor pressure and
viscosity of the compound. These two temperatures may be adjusted
accordingly.Calculations occur on userentry/change of the temperature values, the calculated values heat capacity, Vapor pressure and viscosity are
updated.
Note the temperature limits for each chemical for the use in vapor pressure calculations.
Vapor pressures are determined by
using the Antoine Equation :- Ln(VP) = A - B/(T + C). The vapor
pressure equation is only important to specified temperature range of each compound.
Heat capacities are determined by the
heat capacity equation :- Cp = A + BT + CT^2 + DT^3
LOG(viscosity) = A*[(1/T) - (1/B)]
A,B,C,D are constants for each
equation. T is temperature in deg. K.
Units :
Critical pressure, Bar
Critical Volume, m^3/mol
Critical Temperature, deg K
Critical pressure, Bar
Normal freezing point, deg C
Normal Boiling point, deg C
Liquid Density, kg/m^3
Heat of vaporization at normal
boiling point, J/mol
Standard enthalpy of formation, at
298 K, KJ/mol
Standard Gibbs energy of formation at
298 K, KJ/mol
Heat capacity J/mol K
Vapor pressure, mmHg
Viscosity, mNs/m^2