CO2 and SO2 both are tri-atomic molecules but the heat of vaporization of SO2 is greater than that of CO2 due to the:
Correct answer: C. SO2 is polar and CO2 is non-polar
- A. High electronegativity of S
- B. Greater size of SO2
- C. SO2 is polar and CO2 is non-polar
- D. SO2 is more acidic than CO2
Explanation
More polar molecules tend to form strong intermolecular forces which require a significant amount of heat to be overcome hence SO2 has a greater latent heat of vaporization. The polarity difference between the two molecules is explained below: CO2 is a linear molecule so the resultant dipole moment is zero as the individual dipole moments of the two CO bonds cancel each other out. SO2, on the other hand, is an angular molecule due to which it has a net dipole moment hence SO2 is polar and CO2 is non-polar.
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