C3.1 - States of matter Flashcards
1
Q
Limitations to the particle model
A
- doesn’t show ions/molecules/atoms properly
- doesn’t include size or shape of them
- doesn’t show forces/bonds between them
- doesn’t represent the space between the particles accurately
2
Q
3 states of matter
A
- solid
- liquid
- gas
3
Q
solid particles
A
- cannot be squashed
- packed tightly
- in a regular pattern
- vibrate around in fixed positions
4
Q
Liquid particles
A
- close together
- cannot be squashed
- can slip/slide over each other
- move in a random motion
5
Q
Gas particles
A
- can be squashed
- lots of space between them
- move around randomly
6
Q
What is needed for something to change states
A
- energy is needed to break the bonds between the particles
- so that they can change state
7
Q
The higher the melting/boiling point..
A
the more energy is needed to break those bonds
8
Q
Energy in melting or boiling
A
energy is transferred to the substance from the surroundings
9
Q
Energy in condensing/freezing
A
energy is transferred from the substance to the surroundings
10
Q
what temp does water freeze at?
A
0 degrees celsius
11
Q
What temp does water boil at?
A
100 degrees celsius
12
Q
As there is a change of state …
A
the temp stays constant (doesn’t increase)
