Chapter 12 Study Guide
If
you can answer these questions with increases or decreases or stays
the same, then you are in good shape.
Scenario: As the vapor pressure
of a substance increases (example, water has low vapor pressure, but alcohol
has high vapor pressure. Compare these
so that water is the low vapor pressure and alcohol is the high vapor pressure)
Finish
this statement: As vapor pressure
increases…………
1. Condensation/boiling point ___Decreases________
2. Melting/freezing point ___________
3. Heat of fusion ______
4. Heat of vaporization ____
5. Volitility of the liquid _______
6. Intermolecular forces ___________
As intermolecular
forces increase (example:
molecules with dispersion have the lowest, dipole-dipole molecules are
higher and hydrogen bonding molecules are the highest)
1. Condensation/boiling point ___________
2. Melting/freezing point ___________
3. Heat of fusion ______
4. Heat of vaporization ____
5. Volitility of the liquid _______
6. Vapor Pressure ___________
For
all molecules EXCEPT WATER:
As
pressure decreases, Freezing point ________
As
pressure decreases, boiling point _________
For
WATER:
As
pressure decreases, Freezing point ________ (think about it: Snow in the mountains….)
As
pressure decreases, boiling point _________
(think about it: high altitude
cooking directions)
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Do
you know the differences and relationships between the words: Sublimation, condensation, boiling,
freezing, deposition, melting….etc.
Do
you know how intermolecular forces affect these terms?
Can
you tell which molecules have polar bonds?
Which ones have molecular polarity?
Which ones have dipole-dipole interactions?….etc. (Chapter 6 review if you don’t)
If
a substance has a high heat capacity, will it heat up and cool down quickly?
At
what temperature is water the most dense?
Name
two ways to boil water.