what is eqiullibrium.

Equilibrium represents the state of a process in which the properties like temperature, pressure, and concentration etc of the system do not show any change with passage of time. In all processes which attain equilibrium, two opposing processes are involved. Equilibrium is attained when the rates of the two opposing processes become equal.If the opposing processes involve only physical changes, the equilibrium is calledPhysical Equilibrium. If the opposing processes are chemical reactions, the equilibrium is calledChemical Equilibrium.