Pentane (C₅H₁₂; molar mass = 72 g mol⁻¹, non-polar) boils at 36 °C, while chloromethane (CH₃Cl; molar mass = 50 g mol⁻¹, dipole moment = 1.9 D) boils at −24 °C. In one or two sentences, account for the higher boiling point of pentane in terms of the relative contributions of London dispersion and dipole–dipole forces.