Phase Changes
The point at which all three phases of a substance exist
Triple Point
The temperature at which a substance and the atmosphere exert equal pressure on each other
Boiling temperature
Particles have the greatest potential energy in this state
Gas
This is the Ideal Gas Equation
PV = nrT
PE and # Configs
Liquid to solid
Freezing
At temperature and pressure coordinates that lie to the left of the VP curve, the substance will exist in this phase
Liquid
Temperature is a measure of the average ___.
Kinetic energy
KE Equation
.5mv^2
Based on the PEC diagram, which has the weakest attractive forces?
. 2
. 1
. . .
2
This stays constant during a phase change
Temp
Lower
The velocity of a particle depends on this
Mass
The molar mass of tryptophan (C11H12N2O2)
204.23 g/mol
A substance is always favored at ___ (high/low) PE and ___ (high/low) # configurations.
low, high
Gas to solid
Deposition
Gas to liquid
Condensation
True or false: Water is at room temperature in a container. All particles only exist in the liquid phase.
F
Boiling temperature is a ___ (intensive/extensive) property.
intensive
A substance is favored only at higher temperatues. It belongs in the ___ (bottom/top+left/right) corner of a PEC diagram.
Top right
This increases more during a phase change rather than during the heating process
Potential energy
The higher the intermolecular interactions within a substance, the ___ (more/less) volatile the substance.
A substance exists at its triple point (gas, liquid, solid phases all present). Which phase has the highest average kinetic energy?
trick--all the same
Are you going to do well on this test? (there is only one right answer)
yes
Which has a higher # configurations: liquid nitrogen or liquid water?
Liquid nitrogen