Vocabulary
Going from a liquid to a solid is called what?
Freezing
Which force is the weakest?
London Dispersion Forces
When the level of disorder increases, does entropy increase or decrease?
Increase
What can you use a phase diagram for?
To be able to tell what phase a substance will be in at a given temperature and pressure.
A molecule that has only london dispersion forces would have a high or low melting point?
Enthalpy is the amount of energy in a system and entropy is the level of disorder in a system.
What type(s) of bonds do ALL molecules have?
London Dispersion
Endothermic
What is the point called where all three equilibrium lines meet?
Triple Point
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What is the difference between cohesion and adhesion?
Cohesion is molecules of the same substance sticking together, adhesion is molecules of different substances sticking together.
What type of bond allows the solid form of water to be less dense than the liquid form?
Hydrogen bonds
Does a positive delta H mean you have a endothermic or exothermic reaction?
Endothermic
What are the three equilibrium lines on a phase diagram?
Solid-liquid
Solid-gas
Liquid-gas
How many phases does a lava lamp have?
2!
Going from a solid to a gas is called what?
Sublimation
What three elements can be bonded to hydrogen to form a hydrogen bond?
O, N, and F
Draw 2 PE diagrams (one exothermic and one endothermic), label each one.
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According to the phase diagram on the board, what state will the material be at 10,000 kPa and 50 degrees C?
Liquid
What is responsible for making ice less dense than water?
Hydrogen bonding
What are intermolecular forces?
Forces that act between molecules
What type of bond is characterized as bonds between polar molecules?
Dipole-dipole bonds
As pressure is increased, does entropy increase or decrease?
Decrease
Using the data table provided, construct a phase diagram.
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Name 2 situations in which ice being less dense and/or more expanded than water is relevant in real life.
Answers will vary