When a liquid turns directly into a gas without first becoming a liquid
15
Which state(s) are considered fluids?
Liquids and gases
15
Is evaporation or condensation endothermic?
Evaporation. Heat is added to turn a liquid to a gas, heat is removed to turn a gas into a liquid = condensation (exothermic)
15
How does surface area affect rate of evaporation?
Greater surface area faster the rate of evaporation
20
What is meant by a volatile liquid?
It has a low boiling point, it easily condenses
15
How does an increase in pressure affect boiling point?
Directly related. An increase in pressure= an increase in boiling point
15
What affect does a decrease in pressure have on the volatility of a liquid?
Increase. If you decrease the pressure (on a mountain top) that decreases the boiling point (boils easier) a volatile liquid is one the has a low boiling point.
25
At what temperature does water become ice?
0 degrees C, it is the same temperature ice becomes water. (mp = fp)
15
At what temperature does water vapor become water?
100 degrees C. Same temp that water becomes water vapor bp=cp
15
What affect does an impurity have on boiling point and melting point