Why is a molecule of $CO_2$ nonpolar even though the bonds between the carbon atom and the oxygen atoms are polar?

Md Ariful Islam

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Md Ariful Islam

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$"......and their VECTOR sum gives no resultant dipole."$

$CO_2$ is a linear molecule, and the $/_"O"-"C"-"O"$ is $180^@$. Dipoles are vector quantities; they have magnitide and direction. While there is charge separation, i.e. polarity, in an individual $"C"="O"$ bond, the resultant vector from the sum of the individual bond dipoles in the $""^(delta-)"O"="C"^(delta+)="O"^(delta-)$ molecule is clearly ZERO. The same thing is observed with the $"CCl"_4$ molecule, but not with the $"CHCl"_3$ or $"CH"_2"Cl"_2$ molecule. Capisce?

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