Viscosity

[Jack Van Ryan 1A]

How does the strength of the intermolecular forces between the molecules of a liquid affect its viscosity?

Thank you.

[Benicio Rivera 1F]

Higher the intermolecular forces, higher will be the viscosity. When there is a strong intermolecular force, the molecules of the liquids are strongly bonded to each other. This induces a resistance to move. The liquids whose molecules are polar or capable of forming hydrogen bonds are more viscous.

[Kevin Zhang 3K]

Molasses is made up of sugar molecules which are polar and capable of forming hydrogen bonds with each other

[Colby Irvine 2A]

High viscosity can also be a result of large molecules that are intermolecularly bound. If there are a lot of large molecules, there is more room for intermolecular forces to happen. If the molecules also have high polarizability, there will be high forces of dispersion and e- will be easily distorted among other molecules. Visually it might be like walking through a crowd and bumping into a lot of people. This would indicate high viscosity and lower fluidity.

[Mason_Hoppe_1A]

So to determine if one substance is more or less viscous than the other, would it be more prudent to compare their polarity or their size? If dipole-dipole interactions release ~2 kJmol and London interactions do the same, are the two factors equivalent?

[Chance Lee 1G]

With stronger intermolecular forces governing certain molecules' attractions towards each other, there will be a higher viscosity within these bonds. For example, molecules with intermolecular forces of just LDFs would have a small viscosity compared to other molecules containing hydrogen bonds.

[Matt Vargo 2D]

A liquid's viscosity depends on the strength of intermolecular structure as well as the structure of the individual molecules. With this in mind, we can infer how intermolecular forces and viscosity are interlinked. The stronger the intermolecular forces, the higher the more viscous a fluid will be. Weaker intermolecular forces will constitute a less viscous liquid. This makes sense, as stronger intermolecular forces will increase the resistance of a fluid's ability to flow.

[Milli Zunich 3I]

Higher intermolecular forces create higher viscosity and low intermolecular forces create low viscosity.

[405479701]

If the liquid has high intermolecular forces then the viscosity will also be higher. The same goes with low forces and low viscosity.

[daniellediem1k]

The stronger the IMFs in the liquid, the higher the viscosity.

[William Huang 1K]

A liquid is more viscous when the IMFs are stronger.

[Hannah Carsey 1B]

Intermolecular forces present in a liquid is a factor which affects its viscosity. The stronger the intermolecular forces, the greater the viscosity (more thick liquid)(thickness of a liquid, a liquid’s ability to flow). The weaker the intermolecular forces, the less the viscosity (less thick liquid).