Molecular Interactions
Water Phases
Vapor Pressure
Higher Energy States
Previous Units
100
What is the force that occurs between molecules?
intermolecular forces
100
List the states of matter from lowest energy to highest energy.
solid, liquid, gas
100
What is the first thing that occurs after closing a container with liquid inside?
lose liquid/formation of vapor
100
What is condensation?
gas --> liquid
100
Describe a compound.
A substance made of two or more different atoms.
200
What intermolecular force involves an instantaneous dipole in a nonpolar molecule that can induce a dipole in other nonpolar molecules?
London dispersion force
200
At 1 atm what is the boiling point of water?
100 degrees C
200
What will eventually happen after closing a container with liquid inside?
Equilibrium (condensation and evaporation at the same rate)
200
What is evaporation/vaporization?
liquid --> gas
200
A ___________ change is the change of a substance to a different substance.
chemical
300
What force is created between molecules when a hydrogen is attached to a highly electronegative atom?
Hydrogen bond
300
At 1 atm what is the melting point of water?
0 degrees C
300
When can vapor pressure be measured?
equilibrium
300
Why is speed important for the formation of a gas?
To break free from the intermolecular forces
300
What type of bond would a molecule have if the electronegativity difference between the two atoms in the molecule is 0.8?
polar
400
What type of force has partial (+) and partial (-) charges from different polar molecules attract to each other?
dipole-dipole
400
Why does the temperature stay constant at 100 degrees Celsius as heat is added to water?
It is in transition of a phase change or all the liquid has to turn to gas
400
Higher vapor pressure is a sign that the liquid is _________ volatile
more/very/highly
400
Evaporation is a ______________ ___________ because higher energy components escape the liquid as evaporation occurs.
cooling process
400
Write the isotope symbol for an atom with a mass number of 22 and 12 protons.
22 (superscript) 12 (subscript) Mg
500
Why are electrons important in the formation of a London force?
If there are more electrons it is more likely for a dipole to form
500
What would happen to the boiling point of water if you increase in altitude?
The BP would decrease
500
A molecule with weak intermolecular forces will have ____________ vapor pressure
high/strong
500
Vapor pressure must equal the ___________ ___________ before boiling can occur.
atmospheric pressure
500
Draw the Lewis dot structure for nitrogen tetrafluoride (NF3).
.
M
e
n
u