Heat of neutralisation of weak acid and strong base is less than the heat of neutralisation of strong acid and strong base due to

Heat of neutralisation of weak acid and strong base is less than the h

1.	Heat of neutralisation of weak acid and strong base is less than the heat of neutralisation of strong acid and strong base due to
Answer» A) energy has to be spent for the total dissociation of WEAK acid B) SALT of weak acid and strong base is not stable C) incomplete dissociation of weak acid D) incomplete neutralisation of weak acid Solution :Heat of neutralisation is the change in enthalpy when one gram equivalent of an acid is neutralised by a base or vice versa. All strong acids and bases are almost completely ionised to enthalpy of neutralisation of all strong acids by strong bases are same. weak acids do not undergo complete ionisation IMMEDIATELY on dissolution in WATER. these GET ionised during the reaction of neutralisation. a part of heat evolved during neutralisation is consumed in causing complete ionisation of weak acid. as a result the heat of neutralisation of weak acid with a strong base is less than the heat of neutralisation of stong acid with strong base.