Lab 1 part 2 Flashcards
What is vaporizaton?
When liquids become a gas
What is condensation?
gas turning into a liquid
The temperature
at which this vaporization occurs is
the boiling point of the liquid
The energy involved in vaporization is called
heat of vaporization
Suppose you have a flask with a liquid, open to atmospheric conditions. As the liquid is heated, it gains _______ energy what type of energy? At a certain point, the kinetic energy is ______ the intermolecular forces of attraction.
When this happens, the molecule will tear away from the rest of the molecules and enter the vapor phase and in this case escape to the open atmosphere.
-kinetic
-more than
Suppose the flask was closed. The molecules
will start getting to the vapor phase and then start condensing and soon what will be accomplished? The liquid will vaporize and condense as well.
- equilibrium
When liquids vaporize and condense at the same time , it is called
dynamic equilibrium
At dynamic equilibrium, The
pressure exerted by the vapor is called
vapor pressure
A liquid boils when
When the vapor pressure equals the atmospheric
pressure
Normal boiling point is defined asthe temperature at which the vapor pressure of a
liquid becomes equal to atmospheric pressure.
When the intermolecular forces of attractions (IMF) are high
it takes more energy for the molecule to get
into vapor phase.
High IMF means
low vapor pressure
Low IMF means
high vapor pressure
Low vapor pressure means
low volatility and high BP
High vapor pressure means
high volatility and low
BP.
