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CHE 2B Lecture Notes - Lecture 8: Intermolecular Force

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pearpanda473
26 Apr 2019
School
UC-Davis
Department
Chemistry
Course
CHE 2B
Professor
Whitney Duim

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CHE 2B Full Course Notes
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Related Questions

chem 2 intermolecular forces

16. Identify the strongest intermolecular forces in the following mixtures:

a. I2 in hexane b. CO in pentane c. NaBr in H2O d. Fe+2 and O2

17. Which solution freezes at the lowest temperature

When ions dissolve in water, water molecules form intermolecular forces that release energy. The more water molecules, the more intermolecular forces formed, the more energy released when ions dissolve in water. How does the periodic trend of cation radius for the alkali chloride solids compare to the number of water molecules that can form attractions to an alkali cation?

Ionic Solid

Class AvgDH

Sign -/0/+

Lattice Energy (kJ/mol)

Cation Radius (pm)

LiCl

+

853

60

NaCl

0

787

95

KCl

-

715

133

8. The energy required by the surface molecules to counteract the intermolecular forces by molecules in the bulk is known as ____________. (Points : 3)

Adhesive forces
Cohesive forces
Surface Tension
Vapor Pressure
Capillarity