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Given Delta("ioniz")H^(o)(HCN)=45.2 kJ m...

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

A

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

B

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

C

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

D

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

Text Solution

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The correct Answer is:
B
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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?

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