Chapter 0c

Question 1

• material that makes up all things
• anything that has mass and occupies space

Answer 1

matter

Question 2

2 classification of matter

Answer 2

1. pure substances
2. mixtures

Question 3

have fixed or definite composition

Answer 3

pure substances

Question 4

contain two or more different substances that are physically mixed but not chemically combined

Answer 4

mixtures

Question 5

Classification of pure substance

Answer 5

1. element
2. compound

Question 6

composed of one type of atom

Answer 6

element

Question 7

composed of two or more elements always combined in the same proportion

Answer 7

compound

Question 8

Classifications of mixtures

Answer 8

1. homogeneous mixture
2. heterogeneous mixture

Question 9

• composition is uniform throughout
• different parts of the mixture are not visible

Answer 9

homogenous mixture

Question 10

• composition varies from one part of the mixture to another
• different parts of the mixture are visible

Answer 10

heterogenous mixture

Question 11

• have definite shape
• have definite volume
• particles are closed together in a fixed arrangement
• particles move very slowly

Answer 11

solids

Question 12

• have indefinite shape but definite volume
• same shape as container
• particles are close together but mobile
• particles move slowly

Answer 12

liquids

Question 13

• indefinite shape
• indefinite volume
• same shape and volume as container
• particles are far apart
• particles move very fast

Answer 13

gases

Question 14

characteristics observed or measured without changing the identity of substance

Answer 14

physical properties

Question 15

physical properties include what

Answer 15

• shape
• physical state
• boiling and freezing points
• density
• color

Question 16

• change in state
• change in physical shape
• no change in identity and composition of substance

Answer 16

physical change

Question 17

describe the ability of a substance to
- interact with other substances
- change into a new substance

Answer 17

chemical properties

Question 18

• change in composition
• new chemical properties
• new physical properties

Answer 18

chemical change

Question 19

• measure of how hot or cold an object is compared to another object
• indicates the heat flow from the object with a higher temperature to the object with a lower temperature

Answer 19

temperature

Question 20

temperature scales

Answer 20

• Fahrenheit (°F)
• Celsius (°C)

Question 21

temperature difference between boiling and freezing water are divided into smaller units called __

Answer 21

degrees

Question 22

degrees between the boiling and freezing point of water in Celsius scale

Answer 22

100°C

Question 23

degrees between the boiling and freezing point of water in Fahrenheit

Answer 23

180°F

Question 24

coldest possible temperature

Answer 24

-273°C

Question 25

on Kelvin scale, -273°C is called as __ __

Answer 25

absolute zero (0K)

Question 26

°F formula

Answer 26

1.8(°C) + 32

Question 27

what does matter undergo when it is converted from one state to another

Answer 27

change of state

Question 28

changes from a solid to a liquid

Answer 28

melting

Question 29

changes from a liquid to a solid

Answer 29

freezing

Question 30

point where a substance changes from solid to liquid

Answer 30

melting point (mp)

Question 31

point where a substance changes from liquid to solid

Answer 31

freezing point (fp)

Question 32

- amount of heat released when 1g of liquid freezes - amount of heat needed to melt 1g of solid

Answer 32

heat of fusion

Question 33

heat of fusion of water conversion

Answer 33

- 80cal / 1g H20 - 334J / 1 g H20

Question 34

molecules on surface gain sufficient energy to form gas

Answer 34

evaporates

Question 35

gas molecules lose energy and form liquid

Answer 35

condenses

Question 36

- all the water molecules acquire enough energy to form a gas (vaporize) - bubbles of water vapor appear throughout the liquid

Answer 36

boiling

Question 37

- particles on surface of solid change directly to vapor - no change in temperature

Answer 37

sublimation

Question 38

occurs when gas particles change directly to solid

Answer 38

deposition

Question 39

- amount of heat absorbed to change 1g of liquid to gas at boiling point - amount of heat released when 1g of gas changes to liquid at boiling point

Answer 39

heat of vaporization

Question 40

heat of vaporization of water conversion

Answer 40

- 540cal / 1g H2O - 2260J / 1g H2O

Question 41

heat released formula (diagonal line)

Answer 41

heat = (mass)(temperature change)(specific heat)