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Byju's Answer

Standard XII

Chemistry

Redox Reactions

The heat ener...

Question

The heat energy released during neutralization of 1 equivalent of HF with 1 equivalent of NaOH and with 1 equivalent of $C H_{3} C O O H$ and 1 equivalent of NaOH are respectively:

- 16.4 k c a l, - 12.0 k c a l

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- 12.0 k c a l, - 10 k c a l

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- 13.7 k c a l, i n b o t h

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- 12.0 k c a l, - 16.4 k c a l

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Solution

The correct option is A $- 16.4 k c a l, - 12.0 k c a l$
The heat energy released during neutralization of 1 equivalent of HF with 1 equivalent of NaOH and with 1 equivalent of $C H_{3} C O O H$ and 1 equivalent of NaOH are respectively:
-16.4 kcal, -12.0 kcal
Heat released during neutralization of weak acid < -13.7. In HF, hydration of $F^{-}$ ion is responsible for higher value.

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Similar questions

A: Enthalpy of neutralization of 1 equivalent each of HCI and

H_{2} S O_{4}

with NaOH is same.

R: Enthalpy of neutralization is always the heat evolved when 1 mole acid is neutralized by a base

Q. The enthalpies of neutralization of a strong acid

H A

and weaker acid

H B

by NaOH are -13.7 and -12.7 kcal equivalent. When 1 equivalent of NaOH is added to a mixture containing 1 equivalent of

H A

and

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, the enthalpy change was -13.5 kcal. The ratio of base distributed between

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and

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Q. The enthalpies of neutralisation of a strong acid

H A

and weak acid

H B

by NaOH are -13.68 kcal/equivalent and -2.9 kcal/equivalent respectively. If one equivalent of

H A

and one equivalent of

H B

are mixed with one equivalent of NaOH, the enthalpy change was found to be - 6.9 kcal/equivalent calculate the distribution of NaOH to neutralise

H A

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H B

Q. Assertion :

1 m o l

H_{2} S O_{4}

is neutralised by

2 m o l

N a O H

; however,

1

equivalent of

H_{2} S O_{4}

is neutralised by

1

equivalent of

N a O H

. Reason: Equivalent mass of

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Q. Two solutions initially at

25^{\circ} C

were mixed in an insulated bottle. First solution contains 400 mL of 0.2

N

weak monoprotic acid solution. The other contains 100 mL of 0.8

N

NaOH solution. After mixing the temperature rises to

{26.17}^{\circ} C

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The heat energy released during neutralization of 1 equivalent of HF with 1 equivalent of NaOH and with 1 equivalent of CH3COOH and 1 equivalent of NaOH are respectively:

The heat energy released during neutralization of 1 equivalent of HF with 1 equivalent of NaOH and with 1 equivalent of $C H_{3} C O O H$ and 1 equivalent of NaOH are respectively: