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In this paper we derive relations between the local resistivities inside theinterfacial region and the overall resistances of the surface between twophases for a mixture. These resistivities are the coefficients in theforce-flux relations for the stationary heat and mass transfer through theinterface. We have shown that interfacial resistances depend among other thingson the enthalpy profile across the interface. Since this variation issubstantial (the enthalpy of evaporation is one of the main differences betweenliquid and vapor phases) the interfacial resistivities are also substantial.Particularly, surface put up much more resistance to the heat and mass transferthen the homogeneous phase. This is the case not only for the pure heatconduction and diffusion but also for the cross effects like thermal diffusion.

Integral Relations for the Surface Transfer Coefficients