Vapor, defined

The isothermal vaporization of pure Hquid / represents its transition from saturated Hquid to saturated vapor at temperature T and at saturation vapor pressure The treatment of this transition is faciUtated through use of property changes of vaporization defined by equation 139 ... 

The above equations are combined to form the condition for the burning rate at the surface, y = 0. This becomes a boundary condition for the gas phase where combustion is occurring. This is done best by adding Equations (9.87), (9.88), (9.90) and (9.91). In doing so, a grouping of the enthalpies at the vaporization interface arises which represents the enthalpy of vaporization defined in terms of energy per unit mass of the virgin solid (by convention) ... 

B Dimensionless rate of vaporization defined in text A Dummy variable... 

Re - Reysolds number for the vapor, defined for the present geometry as daipylfiv) U + V ) Sc = Schmidt number for the vapor = ftylpvDv... 

The solubility S of HjS in liquid in equilibrium with vapor, defined as... 

Heat of vaporization, J/g or Btu/lb A, average difference in enthalpy between boiling liquid and superheated vapor, defined by Eq. (13.23) Wavelength of smallest wave that can grow on flat horizontal surface, m or ft [Eq. (13.24)]... 

Flammable liquid A liquid that gives off readily ignitable vapors. Defined by the NEPA and DOT as a liquid with a flash point below 100°E (38°C). 

Wettability is a thermodynamic property of the interface solid-liquid-vapor, defined by the equilibrium contact angle 0, given by the Young s equation ... 

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