Interfacial Phenomena

Surface tension Interfacial tension Surface free energy Measurement of tensions Spreading coefficient


Interface is the boundary between two phases.
Surface is a term used to describe either a gas-solid or a gas- liquid interface.
Interfacial phase is a term used to describe molecules forming the interface between two phases which have different properties from molecules in the bulk of each phase.





Surface Tension





Molecules in the bulk liquid are surrounded in all directions by other molecules for which they have an equal attraction (only cohesive forces).

Molecules at the surface can only develop cohesive forces with other molecules that are below and adjacent to them; and can develop adhesive forces with molecules of the other phase.
Surface tension Interfacial tension Surface free energy Measurement of tensions Spreading coefficient


Interface is the boundary between two phases.
Surface is a term used to describe either a gas-solid or a gas- liquid interface.
Interfacial phase is a term used to describe molecules forming the interface between two phases which have different properties from molecules in the bulk of each phase.





Surface Tension





Molecules in the bulk liquid are surrounded in all directions by other molecules for which they have an equal attraction (only cohesive forces).

Molecules at the surface can only develop cohesive forces with other molecules that are below and adjacent to them; and can develop adhesive forces with molecules of the other phase.
Surface tension Interfacial tension Surface free energy Measurement of tensions Spreading coefficient


Interface is the boundary between two phases.
Surface is a term used to describe either a gas-solid or a gas- liquid interface.
Interfacial phase is a term used to describe molecules forming the interface between two phases which have different properties from molecules in the bulk of each phase.





Surface Tension





Molecules in the bulk liquid are surrounded in all directions by other molecules for which they have an equal attraction (only cohesive forces).

Molecules at the surface can only develop cohesive forces with other molecules that are below and adjacent to them; and can develop adhesive forces with molecules of the other phase.