1What is the strength of Gas Intermolecular forces?
Weak
2Will Hvap always be negative or positive?
Positive
3Substances with lower vapor pressures have...
Stronger Intermolecular forces
4What is the strength of Liquid intermolecular forces?
Moderate
5What is the phase change for "melting"?
Solid to Liquid
6What is the phase change for "Sublimation"?
Solid to Gas
7What is the phase change for "Deposition"?
Gas to Solid
8Stronger Dipole Dipole IM forces means...
Higher BP and MP
9What do Hydrogen bonds have?
Strong intermolecular attractive forces
10What is the strongest intermolecular force?
Ion-Dipole forces
11A higher surface tension means...
Stronger Intermolecular Attractive Forces
12Larger Viscosity means...
Larger Intermolecular Attractions
13What does raising temperature reduce?
Viscosity and Surface Tension
14A faster rate of evaporation means...
Weaker attractive forces
15What increases rate of evaporation?
Increase of Temperature
16Liquids that evaporate easily?
Volatile
17Explain Exothermic process
Transfer of heat from system into surroundings
18Explain Endothermic process
Absorption of heat from surroundings into system
19Explain kinetic molecular theory for Gases...
The kinetic energy is so large it overcomes the attractions between particles.
20Explain Dipole Dipole forces...
When the positive end of a polar molecule attracts the negative end of a polar molecule
21What kind of forces are present in ALL molecules and atoms?
Dispersion forces
22If a molecule is harder to boil that means...
Stronger dispersion forces
23Polar molecules have a ______ and ______ than nonpolar molecules
Higher melting point, higher boiling point
24Nonpolar molecules have _______ properties...
Hydrophobic
25Polar molecules have _______ properties...
Hydrophilic
26Larger surface to surface contact between molecules results in...
Stronger dispersion forces
27What is the phase change for "Condensation"?
Gas to Liquid
28What is the strength of Solid intermolecular forces?
Strong