of oxyethylene groups in the surfactant molecule. The larger n is, the more oxygen there is on the hydrophilic group of the molecule, and more hydrogen bonds can be formed with water, resulting in better water solubility. When n=1~5, the product can be soluble in oil but not in water...
a) Distinguish between dynamic viscosity and kinematic viscosity. b) What ate their SI units and what is the basis of the ISO viscosity grade system for oils? Which will roll down an incline fast: a can of water or a can of ice? Explain why. What is Meissner effect? What are some an...
They include higher alkanes and lipids, typically with melting points above about 40 °C (104 °F), melting to give low viscosity liquids. Oil An oil is any nonpolar chemical substance that is a viscous liquid at ambient temperatures and is both hydrophobic (does not mix with water, ...
Water resistance: washout and sprayoff tests measure how long a grease stays on under water and when sprayed with a high-pressure hose. Base oil viscosity: the stickiness of the oil used to make the particular grease. Load carrying ability: how much pressure a grease can tolerate and still ...
d) Lipids don't dissolve in water. What are lipids for? What are the functions of lipids? What are some functions of lipids? On pouring oil into a glass of water, it is seen that these two substances do not mix. How do lipids move through the body so they can be digested and ...
What is heavy water? What is aquifer recharge? What is lamellae in mineralogy? What is an ice core? What is quenching in metallurgy? What force is acting in a waterfall? What is extractive metallurgy? What does kinematic viscosity mean? What is a funnel cloud? What is amoebiasis? What is...
The density of water changes with the temperature. It increases from 0°C to 4°C (where it is nearly 1) and then decreases from 4°C to higher temperatures. What is the influence of viscosity on digital density measurement? Sample viscosity has an impact on the density measured ...
Viscosity is a scientific term that describes the resistance to flow of a fluid. The fluid can be a liquid or a gas, but the term is more commonly associated with liquids. As a simple example, syrup has a much higher viscosity than water: more force is required to move a spoon through...
Why does ethanol (C2H6O) have a higher viscosity than octane (C8H18)? Describe how you would make 250 mL of an 80% (v/v) ethanol solution. Do you expect methanol (CH3OH) or ethanol (CH3CH2OH) to be more soluble in water? Explain. ...
Oil is often called “black gold,” yet crude oil has a range of viscosity and can vary in color from black to yellow depending on its hydrocarbon composition.13Distillation, the process by which oil is heated and separated into different components, is the first stage in refining. Crude Oil...