![]() ![]() The video below shows several different long chained oils, each progressively more viscous. Glycerol, CH 2OHCHOHCH 2OH, is viscous partly because of the length of the chain but also because of the extensive possibilities for hydrogen bonding between the molecules. Fuel oil, lubricating grease, and other long-chain alkane molecules are quite viscous for this reason. This is because the molecular chains get tangled up in each other like spaghetti-in order for the liquid to flow, the molecules must first unravel. It is defined as the internal frictional resistance of a liquid to the application of a pressure or a shearing stress. The presented results are in good agreement with most values from the literature. The combined expanded uncertainty of reported viscosity is better than 3.0 with a level of confidence 0.95 (k 2). Is the flow laminar or turbulent Given that the density of glycerin. Liquids containing long molecules are invariably very viscous. (c) Brkle GmbH 2022 Viscosity Chemical mPas at 20C Ethyl ether 0,23 Water 1,0087 Olive oil 107,5 Glycerol 1500 Honey 10000 Printing inks 10000000 The (dynamic) viscosity describes the flow behavior of liquids. The dynamic viscosities of glycerol were measured over the temperature range (293394) K and atmospheric pressure using a Brookfield thermosel system. A glycerin at 25 of viscosity, flows through a 150mm diameter pipe with the viscosity. Honey, mostly glucose and fructose (see image below) is a good example of a liquid which owes its viscosity to hydrogen bonding. Liquids whose molecules are polar or can form hydrogen bonds are usually more viscous than similar nonpolar substances. The kinematic viscosity is obtained from: C t viscosity, where C is. glycerol concentration, in the temperature between -25 C and 10 C. 430-GC gas chromatograph, connected to a HT5 capillary column (25 mx 0.32 mm ID. Viscosity is governed by the strength of intermolecular forces and especially by the shapes of the molecules of a liquid. It was shown that glycerol increases the density and dynamic viscosity. Those like ether or gasoline which flow very readily have low viscosities. Liquids which flow very slowly, like glycerin or honey, have high viscosities. The resistance to such flow is called the viscosity. \)īecause its molecules can slide around each other, a liquid has the ability to flow. ![]()
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