Chemical Change Flashcards Preview

Science > Chemical Change > Flashcards

Flashcards in Chemical Change Deck (27):
1

Physical properties

A property you can observe with your five senses

2

Chemical Properties

A material property that can be observed while the material is or has gone through a chemical reaction

3

Melting

The process in which a Solid changes to a liquid

4

Evaporation

The process in which a liquid changes into a gas

5

Freezing

The process in which a liquid solidifies thus making it a solid

6

Solidification

The process of a liquid solidifying from warm and cold temperature instead of just cold

7

Condensation

The process in which gas cools and changes back into a liquid

8

Sublimation

The process in which a solid changes into gas without turning into a liquid first e.g. dry ice

9

Deposition/Desublimation

The process in which a Gas cools into solid without the added step of changing into a liquid first e.g. Carbon Dioxide

10

Solid

A state of matter in which particles are very close together and when heated vibrate e.g. ice

11

Liquid

A state of matter in which particles are more spread and move a liquid always takes the shape of the container it is in e.g. water

12

Gas

A state of matter in which particles are the furthest apart from each other the particles spread out into space. e.g. Steam.

13

Chemical Reaction

a chemical change in which one or more new chemical substances are produced

14

Reactants

chemical substance used up in a chemical reaction. Some chemical bonds in a reactant are broken during the reaction.

15

Products

new chemical substance that results from a chemical reaction

16

Precipitate

solid product of a chemical reaction that does not dissolve in water

17

Reaction rate

The speed in which a reaction occurs

18

Catalyst

chemical that helps to start or speed up a chemical reaction.

19

Rusting

The corrosion of iron from water and oxygen

20

Corrosion

a chemical reaction that wears away a metal. Air, water or chemicals in air and water, as well as many household substances, can be corrosive. Many acids and other corrosive substances are dangerous.

21

Rust

A reddish brown substance formed when iron reacts with oxygen and water

22

Surface protection

coating over a metal surface to prevent it from corroding.

23

Galvanising

protecting a metal by covering it with a more reactive metal that will corrode first

24

Burning

combining a substance with oxygen in a flame

25

Oxidation

chemical reaction involving the loss of electrons by a substance

26

fossil fuel

substance, such as coal, oil and natural gas, that has formed from the remains of ancient organisms. Coal, oil and natural gas are often used as fuels; that is, they are burnt in order to produce heat.

27

Combustion

the process of combining with oxygen, most commonly burning with a flame