select the correct word or phrase to complete the statements about ionic compounds. The melting point of an ionic compound is likely to be a molecular compound

1. Higher than

2. Soultion and the liquid state

3. hard

4. Have varying solubilities  

Explanation:

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.

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error