The enthalpy of neutralisation of HCl by NaOH is –57.1 kJ and that of HCN by NaOH is…

Chemistry · JEE Main · NTA Exams — Chemical Thermodynamics

The enthalpy of neutralisation of HCl by NaOH is –57.1 kJ and that of HCN by NaOH is –12.1 kJ mol–1. The enthalpy of ionization of HCN is :
  1. –69.2 kJ
  2. –45.0 kJ
  3. 69.2 kJ
  4. 45.0 kJ

Answer

(D) 45.0 kJ

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