bond strength

[305115396]

Doe a molecule with a double bond always have a higher boiling point than a molecule that has single bonds but more bonds?

[AhYeon_Kwon_2H]

Since boiling point is contingent upon bond strength, which in turn is measured by dissociation energy (energy required to separate bonds completely), the double bonded molecule will have a higher boiling point.

[whitney_2C]

A molecule with a double bond will not always have a higher bowling point then one with more single bonds. This is because the physical properties like boiling and melting points are determined by intermolecular forces not intramolecular forces. Intermolecular forces are bonding forces between molecules/compounds like London forces, dipole-dipole forces, and hydrogen bonding. These bonds are the ones that affect the state of matter a compound is in at a certain temperature and these are affected by things like polarity. Double bonds and single bonds however are examples of intramolecular forces, or forces within a molecule not between them, and these are what we take into consideration when talking about chemical properties since chemical reactions require the breaking of bonds to create new ones.

[Ahmed Mahmood 4D]

If other factors such as chemical structure and atoms are controlled for, yes, this is true.