Bonds vs Shapes [ENDORSED]

[Ashvi_Luthra_4H]

Would a change in boiling point, viscosity, etc. be more affected by having stronger bonds, such as a double vs. a single, or is it more related to shape?

[405169322]

I believe at its base, stronger bonds would increase boiling point. However, the strength of the bonds in the molecule could be entirely based off the molecular structure. It's a combination of both that controls the boiling point, viscosity, etc.

[Giselle Littleton 1F]

The more bonds a molecule has, the harder it is to break apart. So the boiling point of a molecule would increase if there were more bonds because it takes more energy to break the molecule apart.

[Alan Wu]

Usually viscosity or any property in liquid/solid form is determined by the intermolecular forces between the individual molecules. In that case, single bonds and double bonds don't apply to intermolecular forces. We learned in class that having a rod shape compared to a spherical shape greatly increases the strength of the London Dispersion forces because the induced dipoles can get closer to each other.

[Ashley Fang 2G]

To add to that, the dipoles can get closer together due to the greater surface area in rod-shaped molecules than spherical-shaped molecules, thus increasing the intermolecular forces.