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Learn what is surface tension, the tendency of fluid surfaces to shrink into the minimum area possible. Find out the formula, unit, dimension and examples of surface tension, and how to measure it using different methods.
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At liquid–air interfaces, surface tension results from the greater attraction of liquid molecules to each other (due to cohesion) than to the molecules in the air (due to adhesion). [1] There are two primary mechanisms in play. One is an inward force on the surface molecules causing the liquid to contract.
Learn what surface tension is, how to calculate it and how it varies with temperature and fluid type. Find tables of surface tension values for common fluids and applications.
Dec 20, 2022 · Learn about the physical property of surface tension, which is the force per unit area required to expand the surface of a liquid. Find out the formula, units, causes, examples, and consequences of surface tension, as well as how to measure it.
Jan 30, 2023 · Surface tension is the energy, or work, required to increase the surface area of a liquid due to intermolecular forces. Since these intermolecular forces vary depending on the nature of the liquid (e.g. water vs. gasoline) or solutes in the liquid (e.g. surfactants like detergent), each solution exhibits differing surface tension properties.
The surface tension is force per length and is measured by [N/m] and is acting to stretch the surface. Surface tension results from a sharp change in the density between two adjoined phases or materials.
Surface tension is typically measured in dynes/cm, the force in dynes required to break a film of length 1 cm. Equivalently, it can be stated as surface energy in ergs per square centimeter. Water at 20°C has a surface tension of 72.8 dynes/cm compared to 22.3 for ethyl alcohol and 465 for mercury.
