Which is the strongest bond, ionic or covalent

An ionic bond  

Explanation:

There is some overlap, but an ionic bond is usually stronger.

The lattice energies of ionic substances have a range of 700 kJ·mol⁻¹ to 11000 kJ·mol⁻¹.

Covalent bond dissociation energies range from 150 kJ·mol⁻¹ to 1100 kJ·mol⁻¹.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.