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

Options

A. `-11`
B. `-44`
C. `-55`
D. `-22`

Answer

C

Explanation

No. of equivalents of weak acid 0.4 `xx` 0.2 = 0.08 So, amount of heat liberated per equivalent `= (4.4)/(0.08) = -55` kJ