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Enthalpy of Neutralisation of a Strong Acid with Strong Base

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Estimated time: 2 minutes
CBSE: Class 12

Key Points: Enthalpy of Neutralisation of Strong Acid with Strong Base

  • Heat of neutralisation = amount of heat evolved when 1 g equivalent of acid completely neutralises 1 g equivalent of base in dilute solution
  • H⁺(aq) + OH⁻(aq) → H₂O + 57.36 kJ (for all strong acid–strong base reactions, same value)
  • Method: definite volume of standard HCl solution is neutralised with same volume of NaOH of same normality in a thermos flask → temperature rise noted with 1/10th degree thermometer
  • Heat evolved = calculated → heat of 1 gram equivalent neutralisation extrapolated
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