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- 1. Multiple Choice
The weaker the intermolecular forces of a substance the _____________ the boiling point
higher
lower
- 2. Multiple ChoiceAs pressure decreases, boiling point___decreasesincreasesdecreases then increasesincreases then decreases
- 3. Multiple ChoiceLiquids with weak intermolecular forcescontain a lot of kinetic energyeasily evaporatecannot diffusefreeze easily
- 4. Multiple Choice
According to the reference table, what is the boiling point of ethanoic acid at 80 kPa?
28 oC
100oC
111oC
125oC
- 5. Multiple Choice
Which liquid has the highest vapor pressure at 75oC?
ethanoic acid
ethanol
propanone
water
- 6. Multiple Choice
At which temperature is the vapor pressure of ethanol equal to the vapor pressure of propanone at 35oC?
35oC
60oC
82oC
95oC
- 7. Multiple Choice
When the atmospheric pressure equals the vapor pressure ___ occurs.
freezing
melting
boiling
sublimation
- 8. Multiple Choice
What is the normal boiling point of water
0oC
100oF
50oC
100oC
- 9. Multiple Choice
At which temperature is the vapor pressure of ethanol equal to 80 kPa? Use Table H.
48oC
73oC
80oC
101oC
- 10. Multiple Choice
Which compound has the lowest vapor pressure at 50°C? Use Table H.
ethanoic acid
ethanol
propanone
water
- 11. Multiple Choice
Why does a gas with a lower vapor pressure have a higher boiling point?
the molecules need more energy to break free of their attractions to other molecules and change phase from liquid to gas
the forces of attraction between the molecules are strong
the substance has low volatility
all of the answers are correct
- 12. Multiple ChoiceWhen you increase your altitude, the air pressureincreasesdecreasesstays the same
- 13. Multiple Choice
Which model represents a LOWER Vapor Pressure?
A
B
- 14. Multiple Choice
Which model represents STRONGER Intermolecular Forces?
A
B
- 15. Multiple Choice
Imagine A & B represent the same substance. Which model would be at a HIGHER temperature?
A
B
- 16. Multiple Choice
Which substance has the lowest vapor pressure at 750 C?
water
ethanoic acid
propanone
ethanol
- 17. Multiple Choice
According to Reference Table H, what is the vapor pressure of propanone at 450C?
22kPa
33kPa
70kPa
98kPa
- 18. Multiple Choice
According to Reference Table H, what is the boiling point of ethanoic acid at 80 kPa?
280 C
900 C
1110 C
1250 C
- 19. Multiple Choice
When the vapor pressure of water is 70 kPa the temperature of the water is
20oC
40oC
60oC
91oC
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