PPT Slide

52

• Partial charges on polar molecules attract each other. The molecular dipole moment affects properties such as boiling point.

• To enter the gas phase, the molecules in the liquid phase must  overcome the attractive forces between them.

• A molecular dipole increases the strength of these attractions.

• Both have the same molecular formula (C 2H 2Cl 2 ) and molar  mass but they have different physical and chemical properties.

• Polar cis molecules attract each other more strongly than nonpolar trans molecules. The cis compound boils 13°C higher than the trans.

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