Viscosity of Liquids Part I: Low Viscosities Mona Kanj Harakeh 1 Objectives • To measure and analyze the viscosities of ideal (Toluene/p-Xylene) and nonideal (Methanol/Water) binary solutions and their components. • To determine the Activation Energy to viscous flow. • The effect of temperature change on the viscosity will be studied. Method: The viscosities of liquids are determined by measuring the flow time for various liquids in an Ostwald viscometer. 2 Ostwald viscometer 3
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Viscosity of sweetened water Avery Safley Introduction: Have you ever wondered why your honey comes out of the bottle so slow? The answer to this is viscosity. Viscosity is the resistance of a liquid to flow. Every liquid exhibits this resistance to some degree. Therefore the more resistance shown‚ the higher the viscosity. It can be thought of as fluid friction‚ just as solids show friction between other solids. This friction is caused by the molecules within the substance. Viscosity is
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Lab report: Viscosity of Liquids Introduction This experiment focuses on measurements of different trials of various concentrations. The collected data is used to compare and contrast to the ideal binary solutions and their components. The Ostwald viscometer is a useful laboratory equipment to measure the viscosities of many binary solutions. Background Molecules have the ability to slide around each other‚ result in a flow. Such a flow has a resistance called viscosity. Microscopically
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and incompressible flow is used. However in the real case‚ the viscosity cannot be neglect and the density of the flow is not always constant. Thus Bernoulli’s equation is not always correct. For the lab‚ it is reasonable to assume the flow is inviscid and incompressible. Firstly‚ the pitot was placed at the center of the flow. The skin friction (effect of viscosity) is inversely proportional to distance. Therefore the effect of viscosity can be neglected in the pitot. Secondly‚ the speed of the flow
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Intrinsic Viscosity Introduction One of the most precise measurements in polymer science is also the simplest and cheapest. Intrinsic viscosity‚ which is measured from the flow time of a solution through a simple glass capillary‚ has considerable historical importance for establishing the very existence of polymer molecules. It also provides considerable physical insight. In this lab‚ each group will study the intrinsic viscosity of hydroxypropylcellulose‚ a common polymer derived from cellulose--hopefully
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39. The Viscosity of Liquids After studying the present lecture‚ you will be able to Define viscosity and viscosity coefficient Outline the method to measure viscosity using Ostwald viscometer Determine the average molecular weight of a polymer Determine the surface concentration of 1-butanol in aqueous solution Measure the distribution coefficient of a solute betweenn two solvents 39.1 Introduction Viscosity‚ one of the transport properties‚ arises because of intermolecular attractive and
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Viscosity Science Lab Purpose: To determine of changing the viscosity will affect the time it takes for a marble to flow through a liquid. Hypothesis: If a marble is dropped into dish soap and corn syrup‚ than I predict that the marble in the dish soap will travel faster than the marble in the corn syrup because I know that the viscosity of the corn syrup is thicker than then the viscosity of the dish soap. Also‚ the particles in the corn syrup are more compact than those in the dish soap
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1 LAB SHEET - VISCOSITY OF GLYCERINE Aim: To measure the viscosity of glycerine using Stokes ’ method in which steel balls are allowed to fall through glycerine. Theory: (i) If a body of mass m falls through a viscous fluid‚ it will accelerate until the combination of the viscous force (or drag) FD‚ and the buoyancy force FB balance the gravitational force Fg (= mg) FD + FB = Fg (1) When this equilibrium is reached‚ the body continues to fall‚ but at a constant velocity‚ called the terminal
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Viscosity of some fluids Models with variable viscosity Differential type models Rate type models Integral type models Download Some frequently used models for non-Newtonian fluids Josef M´lek a malek@karlin.mff.cuni.cz Mathematical Institute Charles University 18 March 2011 Josef M´lek a Non-Newtonian fluids Viscosity of some fluids Models with variable viscosity Differential type models Rate type models Integral type models Download Viscosity of some fluids Fluid Air (at Benzene
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Measuring the Viscosity of Motor Oil ME331 Laboratory Assignment #1 Prepared for: Prof. Sangeorzan Submitted by: Abstract An experiment was conducted to model the effect of temperature on the viscosity of motor oil and compare the results to commercial values established by the Society of Automotive Engineers (SAE) for SAE 30‚ SAE 40 and SAE 5W30. The viscosity of the oil sample at eight temperatures between 20 °C and 55 °C was determined using a rotary Brookfield DV-II+ viscometer
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