Chapter 3 Flashcards Preview

Chemistry > Chapter 3 > Flashcards

Flashcards in Chapter 3 Deck (24):
0

Chemistry

The study of matter

1

Matter

Anything that takes up space

2

Substance

Matter that has a uniform and unchanging composition, also known as pure substance

3

Salt is:

100% sodium chloride. Pure substance

4

Waters composition:

Hydrogen and oxygen. Pure substance

5

Physical properties

Characteristics that can be observed or measured without changing the samples composition

6

Examples of physical properties

Density, color, smell,taste, hardness, melting point, and boiling point

7

Extensive properties

Properties that are dependent upon the amount of substance present (mass, length, volume)

8

Intensive properties

Properties that are independent of the amount of substance present (density, color)

9

Chemical property

The ability of a substance to combine with or change into one or more other substances

10

The inability of a substance to change into another substance is a :

Chemical change

11

Both chemical and physical properties depend on:

Conditions of the immediate environment ( temperature and pressure)

12

States of matter

The classification of all matter on earth ( solid, liquid, or gas)

13

Solid

A form of matter that has its own definite shape and volume

14

Liquid

A form of matter that flows, has constant volume, and takes the shape of its container.

15

Gas

A form of matter that flows to conform the shape of its container and fills the entire volume of its container.

16

Vapor

A gaseous state of a substance that is a solid or a liquid at room temperature.

17

Physical changes

Changes that alter a substance without changing its composition

18

Melting and boiling points are:

Phase changes which are important physical properties that may be used to identify unknown substances

19

Chemical change

A process that involves one or more substances changing into new substances, commonly referred to chemical reaction

20

In chemical reactions what are the starting and new substances called?

Starting substances: reactants
New substances: products

21

Some terms used to describe chemical reactions are:

Explode, rust, oxidize, tarnish, ferment, burn, or rot

22

A chemical reaction always produces:

A change in properties/ evidence that a chemical reaction has taken place

23

The law of conservation of mass

States that mass is neither created nor destroyed during a chemical reaction - it is conserved

Mass reactants = Mass products