Question

The absolute enthalpy of neutralisation of the reaction: MgO(s)+2HCl(aq) $\rightarrow$ MgCl2(aq)+H2O (l) will be:

• A. less than - 57.33 kJ mol-1
• B. - 57.33 kJ mol-1
• C. greater than -57.33 kJ mol-1
• D. 57.33 kJ mol-1

Answer 1

Answer: (A)

less than - 57.33 kJ mol-1

Answer 2

MgO(s)+2HCl(aq) $\rightarrow$ MgCl2(aq)+H2O (I) will have an absolute neutralisation enthalpy of -57.33 kJ mol-2.

So, the correct option is (A): -57.33 kJ mol-1