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The heats of neutralisation of CH3COOH, HCOOH, HCN and H2S are -13.2, -13.4, -2.9 and -3.8 kcal per equivalent respectively. Arrange the acids in increasing order of strength

Thermodynamics

Last Post by nimit 3 years ago

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03/10/2021 12:12 pm

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Jaiyush19

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The heats of neutralisation of CH₃COOH, HCOOH, HCN and H₂S are -13.2, -13.4, -2.9 and -3.8 kcal per equivalent respectively. Arrange the acids in increasing order of strength

(a) HCOOH > CH₃COOH > H₂S > HCN

(b) CH₃COOH > HCOOH > H₂S > HCN

(d) HCOOH > H₂S > CH₃COOH > HCN

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03/10/2021 12:14 pm

nimit

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Correct answer: (a) HCOOH > CH₃COOH > H₂S > HCN

Explanation:

The greater the (negative value) of heat of neutralisation, the more is the strength of the acid.

Hence, HCOOH > CH₃COOH > H₂S > HCN

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The heats of neutralisation of CH3COOH, HCOOH, HCN and H2S are -13.2, -13.4, -2.9 and -3.8 kcal per equivalent respectively. Arrange the acids in increasing order of strength

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