Share This Video Whatsapp. Text Solution. Solution :. Very Important Questions. Latest Questions. Class 12th Alcohols, Phenols And Ethers. National Education Day: e-learning Transforming Educational Landscape National education day: e-learning transforming educational landscape.
By using this site you agree to the use of cookies. Check our Cookie Policy for more details. Ethanol has an -OH group and only 2 carbon atoms; 1-hexanol has one -OH group for 6 carbon atoms and is thus more like a nonpolar hydrocarbon than ethanol.
Glycerol is a triol with a structure of propane substituted at positions 1, 2 and 3 by hydroxy groups. While ethanol being an alcohol does have a direct O-H connection. One of the benefits is that it can help the environment by emitting less carbon dioxide into the air.
Well, would it not be glycerol, i. And why? Well, would not viscosity parallel boiling point…and certainly Ethanol has an OH group and only 2 carbon atoms; 1-hexanol has one OH group for 6 carbon atoms and is thus more like a nonpolar hydrocarbon than ethanol is.
Hence, ethanol has intermolecular hydrogen bonds. The alcohols are more toxic than the Simple Alkanes that they are based on, but still mildly so in the minute quantities that may be present as residual solvent. Tomorrow is a mystery. Text Solution. The 1-butanol is therefore more viscous. Honey is more viscous than water because of intermolecular forces and entanglements. For instance, if your average flow rate for water was 20 seconds and corn oil took seconds 5 minutes to flow out of the viscometer, than the viscosity index for corn oil is The U.
Food and Drug Administration FDA has banned gripe water due to the following reasons: Some formulations of gripe water consist of alcohol.
Glycerol has three O—H groups per molecule, while water has only one O—H group per molecule. Mainly, we can use it as a fuel and a fuel additive in vehicles. New Forest Posts: 15, It is more soluble in benzene and almost completely soluble in nitrobenzene. The hydroxyl group on ethanol is able to form hydrogen bonds with other hydroxyl groups on adjacent molecules, making it more difficult for them to "slip past" each other.
Explain why glycerol is much thicker more viscous than ethylene glycol, which in turn is much thicker than ethanol. Skive's The Limit. Phenol is soluble in water, alcohol and most organic solvents. Oxygen is more electronegative than hydrogen, meaning it has a higher tendency to attract electrons. Since 2. A drop of water, a drop of ethanol, and a drop of acetone are placed on separate watch glasses and the rate of evaporation is observed.
I was thinking that it must be due to weaker hydrogen bonding in ethanol than in water. But today is a gift. Other than a beverage it is useful as an antiseptic to clean surfaces from microorganisms.
I am not sure how much the makeup of the solution matters. Methanol tends to harden tissues more than ethanol and is a poor lipid solvent. Water spreads out on glass because the adhesive force between water and glass is greater than the cohesive forces within the water. If you are talking about flow through a pipe, then it would take more power to force glycerin through the pipe than water. If it is simply accelera Phenol is more soluble in NaOH than in water is because phenol is slightly acidic.
Because methanol has weaker IMFs than water, its energy threshold is lower, and a greater fraction of its molecules can overcome their IMFs. In general, molecules with longer chains have higher viscosities because there are more attractive forces that cause the chains to get stuck on each other. This explains why water striders can walk across the surface, and why a paper clip can "float" on water. Crude oil has a higher viscosity than water, it does not flow very easily.
Glycerol or Glycerin is more dense than water 1. Since the polar hydrogen of one alcohol can hydrogen bond with the oxygen of another molecule, there is a good deal of intermolecular hydrogen bonding in alcohols. That is just what is observed — glycerol is far more viscous than water or simple alcohols such as methanol or ethanol, whose viscosity is much like water.
Stronger the intermolecular force, the more is the viscosity of the liquid. Hence, both glycerol and water can form strong intermolecular hydrogen bonds, but glycerol can form more hydrogen bonds per molecule than water. The higher extent of hydrogen bonding in glycerol thus makes glycerol more viscous than water. The hydrogen bonding in ethylene glycol.
One of the most viscous liquids known is pitch, also known as bitumen, asphalt, or tar. Demonstrating its flow and measuring its viscosity is the subject of the longest continuously running scientific experiment, begun in at the University of Queensland in Australia. One of the reasons it took so long to identify tar pitch as the slowest-moving liquid on the planet is because it looks like a solid at room temperature.
The experiment began in at Trinity College Dublin to prove that pitch, a material that appears to be solid at room temperature and is also called bitumen, tar or asphalt, is in fact a liquid. Studies of the superhot material, first done about a decade ago, have revealed QGP is the hottest, least viscous known liquid and is capable of forming the smallest drop of liquid ever seen.
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