Question

What is the bond energy of silicon dioxide?

(a) 7.8 KJ/mol

(b) 401.3 KJ/mol

(c) 639.5 KJ/mol

(d) 1692.9 KJ/mol

The question was asked in final exam.

This interesting question is from Bonding in Solids in chapter Solid Solutions & Crystallography of Engineering Material & Metallurgy

Answer 1

Right answer is (d) 1692.9 KJ/mol

To elaborate: The bond energy of a material is defined as the energy required to return the atoms to an infinite separation. Silicon dioxide forms a covalent bond with a bond energy of 1692.9 KJ/mol. Nitrogen, iron, and sodium chloride have bond energies of 7.8 KJ/mol, 401.3 KJ/mol, and 1692.9 KJ/mol correspondingly.