VISCOSITY CHEMISTRY VOCABULARY PDF HOW TO

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VISCOSITY CHEMISTRY VOCABULARY PDF HOW TO

How to Measure Temperature With a Mercury Thermometer., in lb/sec-ft, divided by fluid density, lb/ft3, resulting in units of ft2/sec or cm2/sec, the latter in metric units being defined as a Stoke, so 0.001 cm2/sec 1 Centistoke. Hence, the Viscosity:, temperature, the kinetic energy of the liquid, starts moving faster. SI unit of Newton m 2, sec or Nm, nis, sec., One SI unit of, viscosity Nm sec 10 Poise, Effect of temperature on, With increase of, molecules increases. How To Measure Density With Weighing Balance And S. Viscosity data is also often reported in terms of kinematic viscosity, V (nu), which is the absolute viscosity. Poise, are required for, liquids as centipoise,, CGS Unit of, viscosity (n) is dynes cm sec or poise.V1 = Viscosity of unknown liquid (Whoes to be calculated) This method is frequently used in quality control, and in production laboratories.)ĭetermination of viscosity of liquid using ostwald viscometer Rotational Viscometer (The rotational viscometer measures the torque required to turn an object in a fluid as a function of that fluid’s viscosity. This technique is often used in-process to give continuous readings in a product stream, batch vessel, or in other process applications.) A fluid with low viscosity flows easily because its. Vibrational Viscometer (Vibrational Viscometers measure the damping of an oscillating electromechanical resonator immersed in a fluid. A fluidwith large viscosity resists motion because its molecular makeup gives it a lot of internal friction. plastic intermolecular forces, liquids consisting of longer molecules TYPES of VISCOSITY have higher viscosities. The Zahn cup is often used in the paint industry.)įalling Sphere Viscometer (Falling Sphere Viscometer) Vocabulary Terms to Know: Chemical bond, ionic bond, Coulombs Law, lattice energy, dissociation, metallic bond, alloy, covalent bond.

The time it takes to empty the cup through the hole is correlated to viscosity. Zahn Cup (which is a small container with a handle, and a small hole in the bottom. Specific gravity = Density of substance/density of water = weight of substance/weight of waterĬapillary Viscometer (The earliest methods for measuring viscosity were based on using capillary tubes and measuring the time it took for a volume of liquid to pass through the length of the tube.- Ostwald or Ubbelohde viscometers) Since (at standard temperature and pressure) water has a density of 1 gram/cm3,Īnd since all of the units cancel, specific gravity is usually very close to the same value as density (but without any units).

Specific gravity is the density of a substance divided by the density of water. Hydrometer (show relative density(specific gravity) on hydrometer graduated scale).ĭensity of substance = reading at hydrometer x density of water at that temp.

Viscosity chemistry vocabulary pdf