State the crystal structures of SiO2 and CO2 and why one has a higher melting point than the other.

SiO2 forms a giant covalent structure while CO2 has a simple molecular structure.In the giant covalent structure of SiO2, strong covalent bonds hold the atoms together in the structure, while CO2 has only weak intermolecular forces or dipole-dipole forces between molecules to hold the molecules together. The covalent bonds of SiO2 are much stronger than weak intermolecular forces of CO2 and so take more energy to be broken, therefore the melting point of SiO2 is much higher than that of CO2 .

Answered by Fabian T. Chemistry tutor

23421 Views

See similar Chemistry A Level tutors

Related Chemistry A Level answers

All answers ▸

"A chromium compound contains 28.4% sodium and 32.1% chromium by mass, while the rest is oxygen. What is the empirical formula of this compound?"


Why are solutions of transition metal ions often coloured


What is the difference between empirical and molecular formula?


Which element, Na or Mg is likely to have the higher melting point? Give reasons for your choice


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2024

Terms & Conditions|Privacy Policy
Cookie Preferences