What does lechateliers principle mean? plz hurry.

its an observation about chemical equilibrium of reactions . it states that changes in the temperature, pressure, volume, or concentration of a system will result in predictable and opposing changes in the system in order to  achieve a new equilibrium state.

Explanation:

LeChatelier's Principle is an "equilibrium subjected to a stress tends to adjust itself so as to relieve the stress."

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.