Question

Select the arrangement that orders the compounds by increasing boiling point based on predominant intermolecular force. Please choose the correct answer from the following choices, and then select the submit answer button. Answer choices N2 < CO2 < NH3 < HF

Answer 1

The arrangement that orders the compounds by increasing boiling point based on predominant intermolecular force is; N2 < CO2 < NH3 < HF

The molecules that compose a substance are held together by intermolecular forces. The physical properties of a substance such as boiling points depends on the nature of intermolecular forces between substances. The greater the magnitude of intermolecular interaction between bonding atoms the higher the boiling point.

Nitrogen and CO2 molecules are only held together by weak dispersion forces.  However, CO2 has a higher boiling point than N2 because CO2 has a higher molecular mass than N2.

Nitrogen is less electronegative than fluorine hence the magnitude intermolecular interaction via hydrogen bonding in HF is greater than that in NH3 consequently, the boiling point of HF is higher than that of NH3.

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