4 - Moisture Flashcards
1
Q
What is the only substance that can change phase?
A
Water vapour
- 97% of water of planet is in the ocean
- 1% of the atmosphere
2
Q
Ice to liquid
A
MELTING
- Melting requires energy
- 334J/g or 80 cal needed
3
Q
Liquid to ice
A
FREEZING
- Freezing looses energy
- 334J/g or 80 cal removed
4
Q
Liquid to water vapour
A
EVAPORATION
- 2260J/g or 600 cals
5
Q
Water vapour to ice
A
DEPOSITION
- 680 cals
6
Q
Ice to water vapour
A
SUBLIMATION
- 680 cals
7
Q
Ice
A
Water expands when it freezes which explains why it is slippery
8
Q
Dew point
A
The temperature to which air must be cooled to become saturated with water vapour (assuming constant air pressure and water content)
Simpler: the atmosphere temperature below which water droplets begin to condense and dew can form
9
Q
Frost point
A
