Chapter 10 PPt. 2

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Characteristics and strength of:
ion-dipole
- moderate
- occurs between ions and polar solvents
Characteristics and strength of:
dipole-dipole
- weak
- occurs between polar molecules
Characteristics and strength of:
london dispersion
- weak
- occurs between all molecules; strenght depends on size, polarizability
Characteristics and strength of:
hydrogen bond
- moderate
- occurs between molecules with O-H, N-H, and F-H
Why don't the boiling points of NH3, H2O, and HF not follow the trend of increasing boiling points with increasing molecular mass down a gorup of hte periodic table

due to Hydrogen bonds the boiling point has to be higher to break the bonds
What us surface tension and why does it occur?
- resistance of a liquid to spread out and increase its surface area
- due to tighter attraction at the surface
Viscosity
Relationship with temperature
- measure of a liquid's resistance to flow
- Increase temperature, decrease viscosity
What's one common way of getting from ne phase to another?

temperature change: breaking weak interactiosn; adding kinetic energy to additional molecules
What is enthalpy?
Temp adn entropy relationship
- heat content of materials
- increase temp, increase entropy
Solid to a liquid

fusion (melting)
What does frost resemble?

a crystalline appearance
Phase changes

a change in physical form but not the chemical identity of a substance
liquid to gas

vaporization
gas to liquid

condensation
liquid to solid

freezing
solid to gas

sublimation
Molar Heat of Fusion

energy required to melt one mole of a solid in kJ
Molar Heat of Vaporization

the energy required to vaporize one mole of liquid

Author

DesLee26

196959

Card Set

Chapter 10 PPt. 2

Description

Liquids, Gases, and Phase Changes

Updated

2013-01-31T22:55:44Z

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