Given Delta(i)H^(Theta)(HCN) = 45.2 kJ m...

Given `Delta_(i)H^(Theta)(HCN) = 45.2 kJ mol^(-1)` and `Delta_(i)H^(Theta)(CH_(3)COOH) = 2.1 kJ mol^(-1)`. Which one of the following facts is true?

`pK_(a)(HCN)=pK_(a)(CH_(3)COOH)`

`pK_(a)(HCN)gtpK_(a)(CH_(3)COOH)`

`pK_(a)(HCN)ltpK_(a)(CH_(3)COOH)`

`pK_(1)(HCN)=(45.17//2.07)pK_(a)(CH_(3)COOH)`

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