Flashcards in C2.3.2 - Changing State Deck (25)
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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 bonds 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 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 compound?
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
Wax
25
