Question

Complete the sentences to best explain the ranking.Match the words below to the appropriate blanks in the sentences.a less polar bondhigher molar massion-dipole forcesstronger intermolecular forcesdipole-dipole forcesdispersion forceshydrogen bonding1. H2S and H2Se exhibit the following intermolecular forces: ________ and__________ .2. Therefore, when comparing H2S and H2Se the one with a ____________ has a higher boiling point .3. The strongest intermolecular force exhibited by H2O is ____________.4. Therefore, when comparing H2Se and H2O the one with _______________ has a higher boiling point.

Answer 1

1. H₂S and H₂Se exhibit the following intermolecular forces dipole-dipole forces and dispersion forces. Hence, both the molecule possess certain dipole moment and they interact with each other. The dispersion force is also known as London force, and this is the weakest intermolecular force.  

2. Therefore, when comparing H₂S and H₂Se, the one with a higher molar mass has a higher boiling point. As one knows that high molecular mass means that more energy is needed.  

3. The strongest intermolecular force exhibited by H₂O is hydrogen bonding.  

4. Therefore, when comparing H₂Se and H₂O, the one with stronger intermolecular forces has a higher boiling point.