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When 400 ml of 2.0 N solution of a weak ...

When 400 ml of 2.0 N solution of a weak acid is neutralized by a dilute aqueous solution of sodium hydroxide under standard conditions, 4.4 kJ amount of heat is liberated. Therefore, the standard enthalpy of neutralization of this weak acid in kJ `eq^(-1)` is

A

`-11`

B

`-44`

C

`-55`

D

`-22`

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Verified by Experts

The correct Answer is:
C
400mL of 0.2 N acid solution produce heat `= 4.4 kJ`
`:. ` 100 mL of 1 mLof 1N acid solution ( 1g eq) will produce heat `=( 4.4)/(400) xx ( 1000) /(0.2) =55kJ`
`i.e.,DeltaH _("neut.") =-55kJ e quiv^(-1)`
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