Phase Changes Review Flashcards
1
Q
- Define: evaporation, boiling, freezing, melting, condensing
A
Evaporation: Liquid to gas
Boiling: Liquid to gas, cooling process, gain energy.
Freezing: Liquid to solid
Melting: Solid to liquid
Condensing: Gas to liquid
2
Q
- Which of these are cooling processes and which are warming processes and why?
A
Condensation and freezing are warming processes, the environment takes energy from them.
Evaporation and melting are cooling processes, they take energy from their environment.
3
Q
- Why does water form on the outside of a cold drink glass or can?
A
Water vapor hits cold glass and loses kinetic energy, becomes cooler and condenses.
4
Q
- What happens to the air temperature right after it snows?
Explain.
A
Because snow requires rain to condense then freeze, which are warming processes, the temperature will get warmer.
5
Q
- Why do you lick (or wet) your fingers before extinguishing the flame of a candle with your fingers?
A
The flame’s heat evaporates the saliva liquid on your fingers instead of burning your skin.
6
Q
Do some Q = ml
A
7
Q
Do some ml=McdeltaT
A
8
Q
Lf:
A
Melting and Freezing
9
Q
Lv:
A
Evaporation and Condensation
