Properties of Substance

Question 1

What is a term that helps describe substances

Answer 1

Physical Properties

Question 2

What one physical property that describes resistance to scratching

Answer 2

Hardness

Question 3

What is a physical property that describes how easy something is to break

Answer 3

Brittleness

Question 4

What are physical properties describing the opposite the opposite of Brittleness (How stretchy)

Answer 4

Malleability and Ductility

Question 5

What are two physical properties that describe the resistance to breaking

Answer 5

Elasticity and Strength

Question 6

What is the difference between malleability

Answer 6

Elasticity is the ability to stretch and snap back to its original shape

Question 7

What is the Physical Property describing how stretchy something is

Answer 7

Tensile Strength

Question 8

What is the Physical Property that describes how strong something is under pressure

Answer 8

Comprehensive Strength

Question 9

What is a physical property that describes how electrically conductive something is

Answer 9

Electrical Conductivity

Question 10

Why are copper and aluminum universally used for electrical wiring?

Answer 10

They both have relatively high electrical conductivity and are relatively inexpensive.

Question 11

The _____ _____ of a substance is the temperature at which the substance melts or freezes, changing from a solid to a liquid or vice versa.

Answer 11

melting point

Question 12

Properties such as thermal conductivity that describe the way substances behave when they are heated are often classed as _________ _________.

Answer 12

Thermal Properties

Question 13

Another example of thermal property is the amount a substance expands or contracts as it is _____ or _______.

Answer 13

heated or cooled

Question 14

The _________ ______ is the total kinetic energy of all the atoms in the substance.

Answer 14

internal energy

Question 15

In scientific work both _____ and ____ scales are used.

Answer 15

Celcius and Kelvin

Question 16

water boils/condenses at what temperature on the Fahrenheit Scale, Celsius Scale and Kelvin Scale?

Answer 16

212 F, 100 C, 373.2 K

Question 17

alcohol boils/condenses at what temperature on the Fahrenheit Scale, Celsius Scale and Kelvin Scale?

Answer 17

172 F, 78 C, 351.2 K

Question 18

The ____ is one of the seven SI System base units.

Answer 18

kelvin

Question 19

The Celsius and Fahrenheit scales use the term _____.

Answer 19

degrees

Question 20

A temperature change of one degree on the Celsius scale is the same as a one-degree change on the ____ scale.

Answer 20

Kelvin

Question 21

Celsius and Kelvin use the same size of degree. The only difference is where the _____ is on the scale.

Answer 21

zero

Question 22

_________ ________ is understood to be the temperature at which all atomic motion would cease.

Answer 22

Absolute zero

Question 23

Pressure is caused by what?

Answer 23

molecular collision

Question 24

A fluid will flow toward the _____ pressure

Answer 24

lower

Question 25

When does low pressure occur?

Answer 25

When wind is moving rapidly

Question 26

When atmospheric pressure drops, it means what kind of weather is coming?

Answer 26

stormy

Question 27

How is atmospheric pressure measured?

Answer 27

barometer

Question 28

How is volume measured?

Answer 28

width x height x depth (how much space an object takes up)

Question 29

Solids&liquids are generally treated as _______ substances.

Answer 29

incompressible

Question 30

What is incompressible?

Answer 30

Can not be pressed down into smaller volumes with increased pressure like gas can.

Question 31

Most substances can exist as a solid, liquid or a gas. These 3 different states are usually called ____ by physicists, although in the field of chemistry they are often called ____.

Answer 31

phases, states

Question 32

There is a 4th phase called _____ (not a soliquid btw)

Answer 32

plasma

Question 33

What is the internal energy of a substance? (This determines the stage or phase a substance is in.

Answer 33

The sum of kinetic energy a substance has.

Question 34

The following features hold for solids:

Answer 34

1. Solids are rigid and have a definite shape 2. Solids have definite volume

Question 35

Explain what happens molecularly to reach the melting point

Answer 35

As temperature increases, the particles will eventually reach the point where they are energetic enough to stay apart from each other at that same temperature if they had a boost of energy to break them apart.

Question 36

What is the melting point

Answer 36

Where the energy level in the particles are just enough to where they can stay apart from eachother at the same temperature, but if a burst of energy is added, that would break them apart

Question 37

What is the heat of fusion?

Answer 37

The amount of energy needed to turn a liquid into a solid or a solid into a liquid

Question 38

What are properties of liquids

Answer 38

1. No definite shape | 2. no definite volume

Question 39

What is heat of vaporization

Answer 39

The amount of energy required to vaporize something

Question 40

What are features of gasses?

Answer 40

1. They are fluid and have no shape | 2. They have no definite volume

Question 41

What is plasma

Answer 41

Ionized gas

Question 42

What is the difference between vapor and gas?

Answer 42

Gas is more commonly used for things like substances such as nitrogen and oxygen that are gases at a normal temperature. Vapor is a term used for substances that are not gasses at room temperatures, such as water and dry ice.

Question 43

What is the heat of Fusion for water?

Answer 43

334 kJ

Question 44

What is the heat of Vaporization of water?

Answer 44

2,260 kJ

Question 45

What is the heat of Fusion for Iron

Answer 45

247 kJ

Question 46

What is the heat of vaporization of Iron

Answer 46

6,090 kJ

Question 47

What is the heat off fusion of copper

Answer 47

209 kJ

Question 48

What is the heat of vaporization of copper

Answer 48

4,730 kJ

Question 49

What is the term when something is turned directly into a gas right from a solid

Answer 49

Sublimation