hydrogen bonds
intermolecular forces D:
Intermolecular force holds large numbers of different molecules together.
This is because the intermolecular forces holding the molecules of phenol together are stronger than the intermolecular forces holding the molecules of alcohol together.
1. Intermolecular forces are the forces between molecules, while chemical bonds are the forces within molecules. 2. Chemical bonds combine atoms into molecules, thus forming chemical substances, while intermolecular forces bind molecules together. 3. Chemical bonding involves the sharing or transferring of electrons, while intermolecular forces do not change the electron stucture of atoms. 4. Intermolecular forces hold objects together, while chemical bonds hold molecules together.
These are polar forces, intermolecular forces of attraction between molecules.
The intermolecular forces holding gas molecules together are not very strong and thus the molecules are free to move around freely. This allows diffusion. The intermolecular forces holding molecules of a solid together are rather strong, and the molecules thus cannot move very freely. This prevents diffusion.
If the intermolecular forces are great enough they can hold the molecules together as a liquid. If they are even stronger they will hold the molecules together as a solid. Water has nearly the same mass as methane and ammonia molecules, but the greater molecular forces between water molecules causes the water to be liquid at room temperature, while ammonia and methane, with weaker intermolecular forces, are gases at room temperature.
Molecules that have strong intermolecular forces are held together more strongly. In order for a substance to boil, it's molecules must separate and gain energy. Because molecules with stronger intermolecular forces are held together more strongly it takes more energy to move them apart, hence the higher boiling point
Dipole forces and London forces are present as intermolecular forces in these molecules.
Hydrogen bonds
between molecules the forces are called intermolecular forces, and between the atoms in a molecule they are called inramolecular forces
Once molecules become close enough to touch, intermolecular forces become repulsive. This is what prevents one molecule from overlapping another. Intermolecular forces pull molecules together at a long range and hold them apart at short range.