Question

define vander waals force in chemistry....​

Answer 1

Van der Waals forces are very weak type of forces..

These forces are universal in nature..

The gases exerts weak Van der Waals on each other..

Van der Waals forces include attraction and repulsions between atoms, molecules, and surfaces, as well as other intermolecular forces....

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Answer 2

Van der Waals forces include attraction and repulsions between atoms, molecules, and surfaces, as well as other intermolecular forces. They differ from covalent and ionic bonding in that they are caused by correlations in the fluctuating polarizations of nearby particles (a consequence of quantum dynamics[4]).

Being the weakest of the weakest chemical forces, with a strength between 0.4 and 4kJ/mol, they may still support an integral structural load when multitudes of such interactions are present. Such a force results from a transient shift in electron density. Specifically, the electron density may temporarily shift more greatly to one side of the nucleus. This generates a transient charge to which a nearby atom can be either attracted or repelled. When the interatomic distance of two atoms is greater than 0.6 nm the force is not strong enough to be observed. In the same vein, when the interatomic distance is below 0.4 nm the force becomes repulsive.

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