Table of Contents
What makes hydrocarbons more viscous?
Liquids whose molecules are polar or can form hydrogen bonds are usually more viscous than similar nonpolar substances. This is because the molecular chains get tangled up in each other like spaghetti—in order for the liquid to flow, the molecules must first unravel.
Why are longer hydrocarbons more viscous?
As the number of carbon atoms increases in hydrocarbons, the viscosity gradually increases – this is due to the intermolecular forces of attraction being greater for longer chains and a higher chance of chains entangling.
Which hydrocarbon has highest viscosity?
Hydrocarbons
| Substance | Molecular formula | Viscosity (μPa·s) |
|---|---|---|
| Methane | CH4 | 11.13 |
| Acetylene | C2H2 | 10.2 |
| Ethylene | C2H4 | 10.28 |
| Ethane | C2H6 | 9.27 |
What causes higher viscosity?
What factors affect viscosity? Viscosity is resistance to flow. For liquids, typically the larger the intermolecular forces (IMF) the higher the viscosity. The other factors that affect viscosity are temperature and the shape of the molecule.
Why is glycerol more viscous than water?
Glycerol has three hydroxyl (OH) groups per molecule as compared to one in water due to which extent of hydrogen bonding is more in glycerol than water as a result of which glycerol is more viscous than water.
Which hydrocarbons are more runny?
When a hydrocarbon is unsaturated, it has some double bonds. These are called an alkenes. The shorter the chain, the more runny it is (less viscous). The shorter the chain, the lower the boiling and melting points.
Are hydrocarbons viscous?
For example, the gases fraction contains hydrocarbons with one to four carbon atoms. These have: have a low viscosity.
Why is glycerol more viscous than methanol?
Answer: So we expect a molecule like glycerol, with three -OH groups, to be “stickier” than water. 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. Glycerol has more hydrogen bonds formed per molecule!
What is viscosity of hydrocarbon?
The viscosity of hydrocarbon mixtures, whether in the gas or liquid phase, is a function of pressure, temperature, and phase composition. Since flow is predominantly in the laminar region in petroleum reservoirs, the influence of fluid viscosity on this flow is especially important.
Do polymers have high viscosity?
The molecular weight of polymer is related to its molecular size, which means that polymers with a larger molecular size have a higher molecular weight. Polymers with a higher molecular weight provide higher viscosity, as shown in Figure p28.
What is viscosity explain the cause of viscosity?
Viscosity is a measure of the resistance of a fluid towards being deformed when under shear stress. Hence, it is also known as shear viscosity. It is caused by the attractive forces between molecules in close contact, and the friction between molecular chains.
Why is glycerol viscosity high?
Glycerol is has 3 OH groups . Which means to one molecule can atleast form 6 hydrogen bonds. This means that the intermolecular forces are much greater because of these many hydrogen bonds. That is why, glycerol has a higher viscosity than water.