A Periodic law is a law that The Physical and Chemical properties of the elements are in the periodic function of their atomic numbers.
Spontaneous change is the change when a physical or chemical change occurs in the system either by itself or under a slight onset of Temperature, pressure or concentration.
The important Physical Properties of Chloroform are : (1) It is heavier than water. It is sparingly soluble in water, but readily soluble in organic solvents, such as Ethanol and ether. (2) It is a poisonous compound.
Thermodynamics deals with energy changes accompanying Physical and Chemical processes.