The fluorocarbon C2Cl3F3 has a normal boiling point of 47.6°C. The specific heats of C2Cl3F3 (l) and C2Cl3F3 (g) are 0.91 J/g-K and 0.67 J/g-K, respectively. The heat of vaporization of the compound is 27.49 kJ/mol. The heat required to convert 50.0 g of the compound from the liquid at 5.0°C to the gas at 80.0°C is __________ kJ.

Intermolecular forces are forces of attraction or repulsion between particles in solids, liquids, and gases. They are also called van der Waals forces.  Here are some ways intermolecular forces vary in solids, liquids, and gases: Solids: Have the strongest intermolecular forces because their particles are tightly packed. This makes solids incompressible and dense. Liquids: Have intermolecular forces that hold the molecules in contact, but are not strong enough to keep them in fixed positions. The particles in liquids are looser than in solids, so the force of attraction is higher than in... Show more

Intermolecular forces are forces of attraction or repulsion between particles in solids, liquids, and gases. They are also called van der Waals forces. 

Here are some ways intermolecular forces vary in solids, liquids, and gases:
Solids: Have the strongest intermolecular forces because their particles are tightly packed. This makes solids incompressible and dense.
Liquids: Have intermolecular forces that hold the molecules in contact, but are not strong enough to keep them in fixed positions. The particles in liquids are looser than in solids, so the force of attraction is higher than in gases but less than in solids.
Gases: Have very weak intermolecular forces. 

Three major types of intermolecular forces in liquids are:
Dipole-dipole attractions
London-dispersion forces
Hydrogen bonding 

Surface tension is a physical property of liquids that is caused by the attraction of liquid molecules due to various intermolecular forces. This property allows the surface of a liquid to resist an external force.

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