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The rod shaped molecule is larger than the spherical shaped molecule, thus experiencing greater intermolecular london dispersion forces. Larger molecules=stronger attraction=harder to break bonds=higher boiling point.
Also considering Van Der Waals forces it’s important to consider surface area. The larger the surface area the more forces there are. Because rod shaped has a larger surface area than spherical shape molecules it has more Van Der Waals forces and therefore will have a higher boiling point.
When two rod-shaped molecules come close together, there are more spots to experience London dispersion forces, so they will be more tightly attracted to each other, thus raising the boiling point.
Rod shaped molecules have a larger surface area that are close to each other, meaning that there is less distance between molecules and stronger interaction of Van Der Waal's forces. The stronger intermolecular forces causes an increase in the boiling point for rod-shaped molecules as compared to spherical ones which have less nearby surface area for interactions to occur.
Rod-shaped molecules have higher boiling points than spherical molecules because of the heightened interactions between the molecules. Boiling points depend on the strength of intermolecular forces. When a molecule is more linear as in the case of rod-shaped molecules, it will have a larger surface area for interactions to occur between molecules. A spherical molecule, in comparison, will have a smaller surface area available for interactions between molecules, so there will be fewer interaction between molecules which will result in a lower boiling point since it is easier to break the interactions between the molecules as there are fewer of them. A rod-shape, in contrast, will have a higher boiling point due to the fact that there are more interactions between the molecules.
Boiling points depend on the strength of intermolecular forces. Thus, because rod shapes have more surface area, which means more area to have Van DerWaals forces between rod shaped molecules, it will have a higher boiling point.
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