AnswersChemistryStates and Changes of Matter

States and Changes of Matter — Test Answers

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21
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Considering the temperature vs. time graph, how does the temperature at the beginning of a change of state compare with the temperature at the end of the change?

A
The temperature is usually lower.
B
The temperature is always the same.
C
The temperature is always lower.
D
The temperature is usually higher.
22
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Which diagram represents the phase that occurs after a solid melts?

A
diagram 1
B
diagram 2
C
diagram 3
D
diagram 4
23

Which event is most likely occurring?

A
effusion because there is a movement of a gas through a small opening into a larger volume
B
diffusion because particles move from regions of low concentration to regions of high concentration
C
diffusion because particles move from regions of high concentration to regions of low concentration
D
effusion because there is a movement of a gas through a large opening into a smaller volume
24

Which arrow represents the transition in which dew is formed?

A
1
B
2
C
4
D
6
25

Which best compares the particles of the substance when it is in region 1 with the particles of the substance when it is in region 3?

A
The particles have less freedom of motion in region 3.
B
The particles have more kinetic energy in region 1.
C
The particles are more orderly in region 1.
D
The particles are slower in region 3.

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