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surface pressure

The change of interfacial tension caused by addition of a given species to a base solution. When an area of liquid covered with a spread substance is separated from a clean area of surface by a mechanical barrier, the force acting on unit length of the barrier is called the surface pressure, π or π s, and is equal to γ 0 − γ where γ 0 is the surface tension of the clean surface and γ that of the covered surface.
PAC, 1972, 31, 49 (Extended chain crystals of linear high polymers) on page 59
PAC, 1983, 55, 1251 (Interphases in systems of conducting phases (Provisional)) on page 1264
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IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8.
Last update: 2014-02-24; version: 2.3.3.
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