Question
Which statement about the evaporation of a liquid is correct?
A The least energetic molecules escape from the surface and the temperature of the liquid decreases.
B The least energetic molecules escape from the surface and the temperature of the liquid increases.
C The most energetic molecules escape from the surface and the temperature of the liquid decreases.
D The most energetic molecules escape from the surface and the temperature of the liquid increases.
Answer/Explanation
Ans:C
Question
A student sets up four cans. Each can contains the same mass of water at 90 0C.
The cans are identical except for the outside surfaces.
Which can will cool down the fastest?
A dull, black surface
B dull, white surface
C shiny, black surface
D shiny, white surface
Answer/Explanation
Ans: A
Question
Liquid evaporates from a beaker.
What happens to the temperature of the remaining liquid and how does this temperature change
affect the rate of evaporation?
temperature | rate of evaporation | |
A | decreases | decreases |
B | decreases | increases |
C | increases | decreases |
D | increases | increases |
Answer/Explanation
Ans: A
Question
During evaporation, molecules escape rapidly from the surface of a liquid.
What happens to the average energy of the molecules of the remaining liquid and what happens
to the temperature of the remaining liquid?
| average energy of remaining molecules | temperature of remaining liquid |
A | decreases | decreases |
B | decreases | increases |
C | stays the same | decreases |
D | stays the same | increases |
Answer/Explanation
Ans: A
Question
Which statement about evaporation is correct?
A Evaporation causes the temperature of the remaining liquid to decrease.
B Evaporation does not occur from a cold liquid near its freezing point.
C Evaporation does not occur from a dense liquid, such as mercury.
D Evaporation occurs from all parts of a liquid.
Answer/Explanation
Ans: A