Notifications
Clear all
0
06/10/2020 10:48 am
Topic starter
Enthalpy of neutralisation of CH3COOH by NaOH is –50.6 kJ/mol and the heat of neutralisation of a strong acid with NaOH is –55.9 kJ/mol. The value of ΔH for the ionisation of CH3COOH is :
(a) 3.5 kJ/mol
(b) 4.6 kJ/mol
(c) 5.3 kJ/mol
(d) 6.4 kJ/mol
1 Answer
0
06/10/2020 10:49 am
(c) 5.3 kJ/mol
Explanation:
Enthalpy of neutralisation of CH3COOH by NaOH is -50.6 kJ/mole ; for strong acid and base this value is 55.9 kJ/mole. Heat evolved in the first case is less as some heat is used up in ionisation of CH3COOH. So, ΔH for ionisation of CH3COOH = 55.9 – 50.6 = 5.3 kJ/mol.