C2.3.2 - Changing State Flashcards Preview

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Flashcards in C2.3.2 - Changing State Deck (26):
1

What happens to the forces of attraction whenever something boils or melts?

They are overcome, and some or all of the bonds between its particles break

2

What could happen when a substance melts or boils?

It could become a liquid, or become a gas

3

What is the process of a solid turning into a liquid?

Melting

4

What is the process of a solid becoming a gas?

Sublimination

5

If the bonds in a substance are strong, will it take more or less energy to break them?

More

6

Give examples of the forces that could break.

Intermolecular
Covalent
Ionic
Metallic

7

What do you know about a substance if its melting point is high?

It has got a lot of strong bonds

8

What do you know about a substance that has a low melting point?

It doesn’t have many strong covalent bonds

9

What is transferred to the surroundings by heat when chemical bonds are formed?

Chemical stored energy

10

What happens to the bonds inside a substance when it condenses / freezes?

The bonds form again

11

What is the process of liquid turning into a solid?

Freezing

12

What is the process of a gas turning into a liquid?

Condensation

13

What are the bonds involved in the state changes of metals?

Metallic bonds

14

What is the relative strength of metallic bonds?

Strong

15

What are examples of metals?

Iron, Mercury

16

What are the bonds involved in state changes in an ionic structure?

Ionic bonds

17

What is the relative strength of ionic bonds?

Strong

18

What is an example of an ionic compound?

Sodium chloride

19

What are the bonds involved in state changes in giant covalent structures?

Covalent bonds

20

What is the relative strength for covalent bonds?

Strong

21

What are examples of giant covalent structures?

Diamond, silica

22

What are the bonds involved in state changes in simple molecules?

Intermolecular forces

23

What is the relative strength intermolecular forces?

Weak

24

What are examples of simple molecules?

Oxygen, water and wax

25

What state are simple molecules usually in at room temperature?

Usually liquid or gas, but can also be a solid but easily melted

26

What is the opposition fo sublimination called?

Deposition