1.

The absolute enthalpy of neutralisation of the reaction MgO(s)+2HCl(aq)rarrMgCl_(2)(aq)+H_(2)O(l) will be

Answer»

Less than -57.33 kJ `mol^(-1)`
`-57.33 kJ mol^(-1)`
GREATER than `-57.33 kJ mol^(-1)`
`57.33 kJ mol^(-1)`

SOLUTION :Heat of neutralization will be less than `-57.33 kJ//"MOLE"` because some amount of this ENERGY will be required for the DISSOCIATION of weak base (MgO)


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