AnswersFL-2003350-Chemistry 1 HonorsLiquids

Phase Changes Answers

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The arrows in the chart below represent phase transitions.Which arrows represent the phase transitions in which heat energy is gained?

Question illustration
A
1, 2, and 3
B
2, 3, and 5
C
3, 4, and 5
D
4, 5, and 6
2
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Which energy change occurs during boiling?

A
Some heat energy of the substance is lost.
B
Heat energy of the substance remains the same.
C
Most heat energy of the substance is lost.
D
Heat energy is absorbed by the substance.
3

Which best explains the relationship between evaporation and temperature?

A
A liquid evaporates slower at lower temperatures because the molecules are more spread apart and are not pushed as easily from the liquid’s surface.
B
A liquid evaporates faster at lower temperatures because the attractions are decreased and more particles can escape the surface of the liquid.
C
A liquid evaporates slower at higher temperatures because the vapor pressure of the liquid is higher, so fewer molecules can escape the surface.
D
A liquid evaporates faster at higher temperatures because more particles have a higher speed and can overcome attractions in the liquid.
4

The diagram below shows the different phase transitions that occur in matter. Which arrow would most likely represent the phase change that occurs when silver is poured into a mold and cools to become a solid bar?

Question illustration
A
1
B
3
C
4
D
5
5

Consider the temperature versus time graph below.At what temperature is the boiling point of this substance?

Question illustration
A
at 0°C
B
between 0°C and 100°C
C
at 120°C
D
above 120°C
6

is initially present in a state where its molecules are far apart. During a change of state, its molecules slow down. Which change of state has most likely taken place?

Question illustration
A
from a gas to a liquid
B
from a liquid to a gas
C
from a solid to a liquid
D
from a gas to a plasma
7

The diagram below shows the different phase transitions that occur in matter.Which statement best describes the process that arrow 1 represents?

Question illustration
A
Molecules are speeding up as boiling occurs.
B
Molecules are slowing to a stop while freezing.
C
Molecules are slowing down during condensation.
D
Molecules are vibrating in stationary positions.
8

A solid substance turns directly into a gas. Which term describes this change?

A
deposition
B
evaporation
C
melting
D
sublimation
9

Which example involves a phase change in which heat energy is released by the substance?

A
freezing ice cream
B
cooking a pot of soup
C
melting ice under sunlight
D
watching frost disappear into air
10

The diagram below shows the different phase transitions that occur in matter. Which arrow would most likely represent the phase change that involves the same amount of energy as arrow 1?

Question illustration
A
2
B
3
C
4
D
5

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