Q. The absolute enthalpy of neutralisation of the reaction $MgO(s) + 2HCl(aq) \rightarrow MgCl_{2}(aq) + H_{2}O(l)$ will be
A) Greater than $- 57.33\ kJ\ mol^{- 1}$
B) $57.33\ kJmol^{- 1}$
C) Less than $- 57.33\ kJ\ mol^{- 1}$
D) $- 57.33\ kJ\ mol^{- 1}$
Explanation
(c)
Heat of neutralisation will be less than $- 57.33$ kJ/mole because some amount of this energy will be required for the dissociation of weak base $(MgO)$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.