How or why intermolecular forces affect physical properties such as melting point?

Explanation:

Inter-molecular forces are those forces which act in between the molecules of a compound or element .These forces are attractive in nature.

When the inter-molecular forces are large,the bonding between the molecules increases.So,it becomes difficult to remove the bonds as inter-molecular forces increase.So, a large heat quantity is required which can be achieved in high temperatures.

This is the reason why melting point increases when inter-molecular forces increase.

adding or remove a gaseous reactant or product changes the concentrations. if the concentration of reactant or product is increased, the system will shift away from the side in which concentration was increased (i.e. if the concentration of reactants is increased, the system will shift toward the products. if more products are added, the system will shift to form more reactants). conversely, if the concentration of reactant or product is decreased, the system will shift toward the side in which concentration was decreased (i.e. if reactants are removed, the system will shift to form more reactants. if the concentration of products is decreased, the equilibrium will shift toward the products).

explanation:

c, liquids evaporate, creating a gas