Question

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`

Answer 1

Correct Answer - C
No. of equivalents of weak acid `0.4xx0.2`=0.08
So, amount of heat liberated per equivalent
`-(4.4)/(0.08)=-55 kJ`.