How does molecular shape influence the physical properties of substances?

Molecular shape plays a significant role in determining the physical properties of substances because the arrangement of atoms within a molecule influences how it interacts with other molecules. For instance, the shape of a molecule can determine its polarity, which affects its boiling and melting points. Polar molecules, which often have asymmetric shapes, tend to have higher boiling points due to stronger intermolecular forces like hydrogen bonding or dipole-dipole interactions compared to nonpolar molecules, which may have similar molecular weights but differ in shape.

Additionally, the molecular shape can influence how substances react chemically. Larger or more complex molecules may be less reactive due to steric hindrance, where the shape obstructs access to reactive sites. On the other hand, certain shapes can enhance reactivity by presenting more favorable orientations for reactants to collide and react.

Thus, the shape of a molecule is crucial in affecting boiling points, reactivity, and other physical and chemical properties, validating the correctness of the answer.