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Chemistry > 2.1- 2.15 States and Kinds of Matter, Chemical Equations, Reaction Heat > Flashcards

2.1- 2.15 States and Kinds of Matter, Chemical Equations, Reaction Heat Flashcards

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1
Q

What are the 3 states of matter?

A

Liquids, solids, gases

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2
Q

What cannot flow from place to place?

A

Solids

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3
Q

What can easily change shape?

A

Liquids, gases

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4
Q

What takes the shape of its container?

A

Liquids, gases

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5
Q

What does not take the shape of it’s container?

A

Solids

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6
Q

What sometimes fills it’s container?

A

Liquids

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7
Q

What always completely fills it’s container?

A

Gases

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8
Q

What does not easily change shape?

A

Solids

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9
Q

What can flow from place to place?

A

Liquids, gases

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10
Q

Solid to gas =

A

sublimation

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11
Q

Solid to liquid =

A

melting

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12
Q

Liquid to gas =

A

evaporation

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13
Q

Gas to liquid =

A

condensation

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14
Q

Liquid to solid =

A

freezing

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15
Q

Gas to solid =

A

deposition

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16
Q

What are the two types of matter?

A

mixtures and pure substances

17
Q

What are the two types of mixtures?

A

homogeneous and heterogeneous

18
Q

What are the two types of pure substances?

A

elements and compounds

19
Q

What kind of mixture can you not notice phase boundaries?

A

homogeneous mixtures

20
Q

does not alter the composition of the substance

A

Physical change

21
Q

alters the composition of the substance

A

Chemical change

22
Q

What does H₂O consist of?

A

two hydrogens, one oxygen

23
Q

What does 2H₂O consist of?

A

4 H atoms and 2 O atoms

24
Q

What does H₂O₂ consist of?

A

2 H atoms and 2 O atoms

25
Q

What is the law of conservation of mass?

A

Matter cannot be lost in any chemical reactions

26
Q

What is thermochemistry?

A

The study of heat changes in chemical reactions

27
Q

What is the “system?”

A

The specific part of the universe that is the interest of study

28
Q

A positive change in enthalpy signifies

A

an endothermic reaction

29
Q

A negative change in enthalpy signifies

A

an exothermic reaction

30
Q

What is a state function?

A

Properties that are determined by the state of a system regardless of how the system was achieved

31
Q

What are examples of state functions?

A

Temperature, volume, pressure, energy

32
Q

What does Hess’s law involve?

A

Enthalpy change, and how the sum of the overall reaction is a total of each individual step carried out

33
Q

What is specific heat?

A

the amount of heat needed to raise the temperature of 1 gram of the substance by one degree Celsius

34
Q

What is heat capacity?

A

the amount of heat needed to raise the temperature of a given amount of the substance by one degree Celsius

Chemistry (9 decks)

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