Why do polar molecules have more surface tension?

Why do polar molecules have more surface tension?

Polar molecules have partially positive and partially negative sides (which correspond to the side of the molecule which is more or less electronegative). Because opposite charges attract one another, these molecules stick electrostatically.

How does polarity influence surface tension of water droplets?

The water molecules attract one another due to the water’s polar property. The hydrogen ends, which are positive in comparison to the negative ends of the oxygen cause water to “stick” together. This is why there is surface tension and takes a certain amount of energy to break these intermolecular bonds.

Why do nonpolar molecules have less surface tension?

1 Answer. Ernest Z. Non-polar molecules have a lower surface tension because they have lower intermolecular forces of attraction.

How is the polarity of a molecule related to its properties?

The polarity of a molecule has a strong effect on its physical properties. Molecules which are more polar have stronger intermolecular forces between them, and have, in general, higher boiling points (as well as other different physical properties).

What are factors affecting surface tension?

Surface tension is caused by the effects of intermolecular forces at the interface. Surface tension depends on the nature of the liquid, the surrounding environment and temperature. Liquids where molecules have large attractive intermolecular force will have a large surface tension.

How does polarity influence water’s role as a solvent?

The polarity of water molecules means that molecules of water will stick to each other. This is called hydrogen bonding. Polarity makes water a good solvent, gives it the ability to stick to itself (cohesion), stick to other substances (adhesion), and have surface tension (due to hydrogen bonding).

Is low surface tension a polar molecule?

Non-polar molecules have a lower surface tension because they have lower intermolecular forces of attraction.

What three properties are affected by the polarity of molecules?

There are three main properties of chemical bonds that must be considered—namely, their strength, length, and polarity. The polarity of a bond is the distribution of electrical charge over the atoms joined by the bond.

What influences polarity?

The polarity of bonds is caused due to the interaction of the bonds between molecules and atoms with different electronegativities. Consider an electromotive force (EMF) or an electric potential, acting between two points. Here, the points or poles have a greater number of electrons than the other.

What can increase the surface tension of water?

The Presence of ImpuritiesThe presence of impurities on the surface of, or dissolved in, a substance directly affects the surface tension of the liquid. The surface tension of water, for example, will increase when highly soluble impurities are added to it.

What are the three factors on which surface tension depends and how?


  • The presence of any contamination or impurities.
  • The presence of dissolved substances.
  • Electrification.
  • Temperature.

What causes surface tension in water?

Surface tension in water owes to the fact that water molecules attract one another, as each molecule forms a bond with the ones in its vicinity.