Chemistry Chapter test 3 Flashcards

1
Q

solids have no definite shape and no definite volume

A

false

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2
Q

perspiration cools the body by means of sublimation

A

true

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3
Q

Boyle’s law describes the describes the behavior of gases

A

true

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4
Q

the change of liquid to a gas is called vaporization

A

true

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5
Q

matter can exist in only three - solid, liquid, and gas

A

false

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6
Q

an amorphous solid can be be thought of as a slow- moving liquid

A

true

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7
Q

according to Charles’ law, the volume of a fixed amount of gas varies with the temperature of the gas

A

false

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8
Q

the sun contains matter in the plasma phase

A

true

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9
Q

the change of a substance from a solid to liquid is called freezing

A

false

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10
Q

the temperature must be constant for Boyle’s law to be used

A

true

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11
Q

the phase change that is the reverse of condensation is

A

vaporization

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12
Q

forces of attraction limit the motion of particles most in

A

solid

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13
Q

collisions of helium atoms and the walls of a closed container cause

A

gas pressure

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14
Q

the change of a substance from a gas to a liquid is called

A

condesation

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15
Q

the change of a liquid to a solid

A

freezing

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16
Q

when particles in a closed container are heated, they

A

move faster

17
Q

when substance go directly from the solid phase to the gas phase, the phase is called

A

sublimation

18
Q

which of the following phase changes is an exothermic change

A

deposition

19
Q

solids that lose their shape under certain conditions are

A

amorphous

20
Q

which of the following will cause a decrease in gas pressure in a closed container

A

lowering the temperature

21
Q

99% of all the matter that can be observed in the universe exists as

A

plasmas

22
Q

an example of a substance that sublimes is

A

dry ice