Inta And Intra molecular Forces

Question 1

Explain the intermolecular forces.

Answer 1

Intermolecular forces are attractive forces between molecules of a gas, or of liquids, and of solids.

Question 2

what are the Common types of intermolecular attractions

Answer 2

Dipole–Dipole attractions
Ion-Dipole attractions and Dipole-induced dipole attractions.
Dispersion Forces or London forces.
Hydrogen bonding.

Question 3

Dipole-dipole, dipole-induced dipole, and dispersion forces make up what chemists commonly refer to as

Answer 3

van der Waals forces.

Question 4

what is a dipole-dipole force ?

Answer 4

Dipole-dipole forces are attractive forces between polar molecules.
between molecules that possess dipole moments.
Their origin is electrostatic.
HCl undergoes dipole-dipole attractions.

Question 5

what is ion-dipole forces?

Answer 5

These intermolecular forces occur between an ion(cation and anion) and a dipole.
The strength of this interaction depends on the charge and size of the ion and one hand and on the magnitude of the dipole on the other.

Question 6

The larger the molecule the …..

Answer 6

the weaker the force of attraction.

Question 7

what are london forces

Answer 7

These are forces that occur in all species, polar and non-polar.
They are a result of the rapid movement of electrons in molecules causing instantaneous dipole that are not permanent.
They increase with increasing size and molar mass.

Question 8

Which one would form a stronger attraction with Na+ between NH3 and NH2F, and why?

Answer 8

NH2F forms a stronger attraction with Na than NH3 because the greater positive charge on the nitrogen atom in NH2F.

Question 9

What type(s) of intermolecular forces exist between the following pairs:
(a) HBr and H2S
(b) Cl2 and CBr4
(c) I2 and NO3 -
(d) NH3 and C6H6?

Answer 9

a) hydrogen bonds and london forces
b) london forces
c)ion diploe forces
d)hydrogen bonds, london forces and diple diple forces.