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Higher melting point between SiO2 and CO2

Would it be SiO2 because the Si atom has a greater difference in electronegativity with oxygen compared to the C atom, which would cause a greater polarity and stronger bond?

Halp pls

Reply 1

Pigster

One is simple, t'other is giant.

Why do you think a greater difference in electronegativity would lead to a stronger bond?

(edited 8 years ago)

Reply 2

chichimayam

SiO2 is a giant molecular network structure. All atoms bonded together.
CO2 is a simple molecular structure with very weak van der waals forces between the molecules so melting point is lower.