Question

Given : Enthalpy of ionization of two acids
AH° (HCN) = 45.2 kJ mol
AH° (CHCOOH) = 2.1 kJ mol!
Which relationship for the two acids is true
(1) PK (HCN) = 2K, (CH,COOH)
(2) pK, (HCN)> PK (CH-COOH)
(3) PK, (HCN)<pK, (CH-COOH) 45.2
(4) PK, (HCN) =2.1pK(CH,COOH)​

Answer 1

Answer:

(2) pK, (HCN)> PK (CH-COOH)