What is London or dispersive interaction How does this interaction originate between the molecules?

The London dispersion force is a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles. This force is sometimes called an induced dipole-induced dipole attraction.

How do London dispersion forces contribute to the function of macromolecules?

Van der Waals or London dispersion forces are the universal forces responsible for attractive interactions between nonpolar molecules. When molecules are approaching each other, the temporary dipoles of one molecule induce opposite dipoles in the other approaching molecules, thus resulting in a net attractive force.

What is the relationship between the intermolecular forces in a solid and its melting temperature?

What is the relationship between the intermolecular forces in a solid and its melting temperature? The stronger the intermolecular forces, the higher the melting point.

Why does the London dispersion force is considered as the weakest IMF while the hydrogen bond is the strongest?

Lesson Summary This force is weaker in smaller atoms and stronger in larger ones because they have more electrons that are farther from the nucleus and are able to move around easier.

What is the relationship between polarizability and dispersion forces?

Polarizability affects dispersion forces in the following ways: As polarizability increases, the dispersion forces also become stronger. Thus, molecules attract one another more strongly and melting and boiling points of covalent substances increase with larger molecular mass.

How does London dispersion forces increase?

Polarizability which is the ease with which an electron cloud can be deformed – larger molecules have greater number of electrons and therefore are more polarizable. This leads to stronger London dispersion forces. The larger the surface area, the greater the dispersion forces.

What is the relationship between the intermolecular forces in a liquid and its vapor pressure and boiling point?

Higher the intermolecular forces between the liquid particles, harder it is for it to escape into the vapor phase, ie., you need more energy to convert it from liquid to the vapor phase, in other words, higher its boiling point.

What is the relationship between intermolecular forces and temperature?

Molecules with stronger intermolecular forces are pulled together tightly to form a solid at higher temperatures, so their freezing point is higher. Molecules with lower intermolecular forces will not solidify until the temperature is lowered further.

Why are London dispersion forces called dispersion forces?

The London theory has much similarity to the quantum mechanical theory of light dispersion, which is why London coined the phrase “dispersion effect”. In physics, the term “dispersion” describes the variation of a quantity with frequency, which is the fluctuation of the electrons in the case of the London dispersion.