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

Question 1

What are the 3 states of matter?

Answer 1

Liquids, solids, gases

Question 2

What cannot flow from place to place?

Answer 2

Solids

Question 3

What can easily change shape?

Answer 3

Liquids, gases

Question 4

What takes the shape of its container?

Answer 4

Liquids, gases

Question 5

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

Answer 5

Solids

Question 6

What sometimes fills it’s container?

Answer 6

Liquids

Question 7

What always completely fills it’s container?

Answer 7

Gases

Question 8

What does not easily change shape?

Answer 8

Solids

Question 9

What can flow from place to place?

Answer 9

Liquids, gases

Question 10

Solid to gas =

Answer 10

sublimation

Question 11

Solid to liquid =

Answer 11

melting

Question 12

Liquid to gas =

Answer 12

evaporation

Question 13

Gas to liquid =

Answer 13

condensation

Question 14

Liquid to solid =

Answer 14

freezing

Question 15

Gas to solid =

Answer 15

deposition

Question 16

What are the two types of matter?

Answer 16

mixtures and pure substances

Question 17

What are the two types of mixtures?

Answer 17

homogeneous and heterogeneous

Question 18

What are the two types of pure substances?

Answer 18

elements and compounds

Question 19

What kind of mixture can you not notice phase boundaries?

Answer 19

homogeneous mixtures

Question 20

does not alter the composition of the substance

Answer 20

Physical change

Question 21

alters the composition of the substance

Answer 21

Chemical change

Question 22

What does H₂O consist of?

Answer 22

two hydrogens, one oxygen

Question 23

What does 2H₂O consist of?

Answer 23

4 H atoms and 2 O atoms

Question 24

What does H₂O₂ consist of?

Answer 24

2 H atoms and 2 O atoms

Question 25

What is the law of conservation of mass?

Answer 25

Matter cannot be lost in any chemical reactions

Question 26

What is thermochemistry?

Answer 26

The study of heat changes in chemical reactions

Question 27

What is the "system?"

Answer 27

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

Question 28

A positive change in enthalpy signifies

Answer 28

an endothermic reaction

Question 29

A negative change in enthalpy signifies

Answer 29

an exothermic reaction

Question 30

What is a state function?

Answer 30

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

Question 31

What are examples of state functions?

Answer 31

Temperature, volume, pressure, energy

Question 32

What does Hess's law involve?

Answer 32

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

Question 33

What is specific heat?

Answer 33

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

Question 34

What is heat capacity?

Answer 34

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