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chemistry 4/11/14


Attraction between molecules? Intermolecular forces
Do intermolecular forces influence whether a substance is solid, liquid, or gas? yes.
When the partially positive pole of one molecule attracts the negative pole of another molecule is called?? Dipole-Dipole forces
Bonds that occur when hydrogen is bonded with: F,O, and N.??? Hydrogen bonds
A temporary uneven balance that allows that area to be temporarily changed.? Dispersion(London)forces
What are the bonds in order of strongest to weakest? ionic,metallic,dipole,dispersion.
Give me a description of solids? Vibrating particles, not fluids,resist compression.
The only solid denser than liquid is? ice!!!!!!
Particles that occur in a regular,repeating pattern? Crystalline solid
Particles that have no pattern? Amorphous solid
Temperature that a substance changes form a solid to a liquid. Melting point
Melting? Solid to liquid....common sense!!!!!
Freezing? Liquid to solid. if you didn't know that just press the x in the right corner now... :(((
Produces a rise in temperature that can be sensed? Sensible heat
Heat that produces a phase change by breaking bonds? Latent heat ( no temp change)
Direct change from solid to gas? Sublimation ex. dry ice.
Direct change from gas to solid? Deposition
A repeating 3d pattern of positive and negative ions in a crystal. Crystal Lattice
The simplest unit of repetition in a crystal lattice, the building block of the crystal?? Unit Cell
A substance that forms more than one crystal form is called?? Polymorph
One of 2 or more forms of a polymorphic element that exist in the same physical state. Allotrope ex. sulfur,arsenic,phosphorus.
Weak bonds =?? Low melting point
Energy released when gas changes to a crystal? Lattice energy
Atoms of a noble gas that form soft solids at very low temps?? Atomic crystals
Weak forces that hold covalent bonds together? Covalent molecular crystals
Non-mettalic elements covalently bonded into a large network of atoms.?? Covalent network crystal
Ions that form a repeating network? Ionic crystals
Metal ions? Metal ions surrounded by mobile electrons.
Can liquids be compressed? No
Liquids are much denser than gases? yes.
Attraction between particles of liquid is called? cohesion
Attraction between a liquid and other materials? adhesion
Elastic skin on the surface of a liquid? surface tension
A substance that reduces surface tension? a surfactent
The thickness of a liquid is called? viscosity
A curved upper surface of a column of liquid? Meniscus
The movement of a liquid up a narrow tube is called? Capillary action
Liquid changing to a gas is called? Vaporization!
gas changing to a liquid is called? condensation!
vaporization below the boiling point? vaporization
pressure exerted by the evaporation molecules? Vapor pressure
When evaporation occurs at the same rate as condensation. Dynamic equalibrium
rapid vaporization caused by application of heat is called? Boiling
Temp at which a liquid boils? boiling point.
Using vaporization and condensation to seperate a mixture of liquids is called? distillation.
What shows when a substance is solid, liquid or gas at different temperatures ad pressures? Phase diagram
The temperature and pressure where a substance can be a solid, liquid or gas? The triple point
What is the triple point of water? 0.01 C
the highest temp at which pressure will liquefy as a gas? The critical temperature
The pressure needed to liquefy a gas at its critical temperature!?? Critical pressure
The science of the super cold is called? Cryogenics
If your'e a lovely lading reading this without a banquet date... Don't worry I'm available (unless your name is not Kierstin) haha
Temperature at which vapor pressure equals 760 torr ?? Normal boiling point
Strong cohesion =?? more viscosity!
Created by: Kyle Witt