Why is the vapor pressure of cis-dibromoethene lower than the vapor pressure of trans-dibromoethene?

Question

Quizplus · Accepted Answer

cis-dibromoethene has a higher dipole moment because the two bromine atoms are on the same side of the molecule, creating a polar molecule. This leads to stronger dipole-dipole forces between molecules, resulting in a lower vapor pressure than trans-dibromoethene, which has a lower dipole moment due to the bromine atoms being on opposite sides of the molecule.

Why Is the Vapor Pressure of Cis-Dibromoethene Lower Than the Vapor