Question

Chlorine reacts with both hydrogen and sodium to form hydrogen chloride and sodium chloride respectively. Hydrogen chloride has a melting point of -114 degree celcius, whereas sodium chloride has a melting point of 801 degree celcius.

the question: Explain why the melting point of these two compounds are so different.

Answer 1

My sis said HCl is form by covalent bond and its molecules is held by weak van der Waal's forces, which requires less energy to overcome the intermolecular force
NaCl is formed by ionic bond, which is compound requires more energy to overcome the bonding
These results in the difference