EXPERIMENT 5 GAS DIFFUSION COEFFICIENT OBJECTIVES: Determine the gas diffusion coefficient of acetone using the established Winkelmann’s method KEYWORDS Diffusivity‚ Gas Diffusion Coefficient‚ Winkelmann’s method OVERVIEW The knowledge of physical and chemical properties of certain materials is important because very often process engineering deal with the transformation and distribution of these materials in bulk. One such property is diffusivity. Mass transfer by diffusion takes place
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Introduction Diffusion and osmosis are two types of passive transport. Diffusion is a random movement of molecules from an area of high concentration to an area of low concentration. Osmosis is a type of diffusion that diffuses water through a selectively permeable membrane. There were two parts to the experiment‚ the dialysis tubing lab and the potato lab. In the first experiment‚ the dialysis tubing acted as a semi-permeable membrane. A semi-permeable membrane is a membrane
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Jean Perrin‚ a French physicist who later won the Nobel prize‚ spring boarded off of Einstein’s work. Using Brownian motion as evidence‚ he proved in 1911‚ once and for all‚ that matter is made of atoms and molecules. Diffusion Diffusion‚ also called molecular diffusion‚ is the process by which molecules of a given substance move from an area of relatively high concentration to an area of lower concentration. When the molecules have diffused so that they are in a uniform concentration‚ this
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Biology Lab #1: Chemical Diffusion Purpose To discover how the size of a cell affects the diffusion of chemicals throughout the cell. Hypothesis I predict that as the cell size increases the diffusion depth and the diffusion rate will decrease. Equipment • Eye protection • 250 mL beaker • Timing device • Scoopula • Ruler • Scalpel • Sodium hydroxide solution • 3 different sized cubes of phenolphthalein agar • Paper towels Purpose
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Purpose: The purpose of this lab is to test the effects of osmosis on eggs in hypertonic solutions and hypotonic solutions. Hypothesis: If the corn syrup is a hypertonic solution‚ then the egg’s size will shrink. If the water is a hypotonic solution‚ then the egg will swell. Materials: Styrofoam cups (2 per group) Styrofoam cups to weigh down egg (2) Balance Paper towels Vinegar (enough to cover egg) Distilled water Corn syrup Fresh eggs (2 per group) Procedure: Day
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The Rate of Diffusion in Different Temperatures Purpose: To see if the temperature of a solution will change the rate blue diffuses in it. This will be tested by timing how long it takes dye to diffuse in warm water‚ cold water‚ and room temperature water. Hypothesis: I think that the dye will diffuse at a faster rate in the warm water than in the cold water. I believe that the room temperature water will have the dye diffuse faster than the cold water but slower than the warm water. Variable:
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The Product OBJECTIVES: * Definition of Product * Product Concept * What is Branding Packaging and Labeling What is Product? A product is anything offered for sale by a firm to buyers to satisfy their wants and needs. Products may take any of the following forms: * A physical object like a toy or a kilo of pork * A service like a Ferris wheel ride or a dental check-up * A place like London or Boracay * An organization like the Knights of Columbus or the Philippine
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International Research Journal of Finance and Economics ISSN 1450-2887 Issue 15 (2008) © EuroJournals Publishing‚ Inc. 2008 http://www.eurojournals.com/finance.htm Predicting Corporate Failure of Malaysias Listed Companies: Comparing Multiple Discriminant Analysis‚ Logistic Regression and the Hazard Model Nur Adiana Hiau Abdullah Universiti Utara Malaysia‚ Associate Professor Faculty of Finance and Banking‚ Universiti Utara Malaysia Sintok 06010‚ Kedah‚ MALAYSIA E-mail: diana897@uum.edu.my Tel:
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The product The first market mix element is Product. A product is anything that can be offered to a market for attention‚ acquisition‚ use or consumption that might satisfy a need or want. Product decision normally base on brand name‚ functionality‚ styling‚ quality‚ safety‚ packaging‚ repairs and support‚ warranty‚ accessories and services. These product attributes can be manipulated depending on what the target market wants. Also‚ customers always look for new and improved things‚ which is
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itself with the polar heads of the phospholipids. Hydroxyl head – is hydrophilic and therefor orients itself with the polar heads of the phospholipids. Steroid Rings – Consists of four hydrogen rings which attract the tail of the phospholipid to make the cell membrane less soluble Steroid Rings – Consists of four hydrogen rings which attract the tail of the phospholipid to make the cell membrane less soluble Cholesterol can approximately make up 50% of the plasma membrane. It Reduces membrane
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