Chemistry- Intermolecular Forces and Structure of Solids
Terms
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- What are the two types of solids
- Crystalline, Amorphus
- What are the Characteristics of Amporphus Solids
- Considerable disorder, no specific form, large complicated molecules, Melt over a range of temperatures, often exhibit cleavage
- Characteristics of Crystalline Solids
- Regular repeating arragement, specific melting point, lattice made of unit cells, structure determined by x-ray diffraction
- What are the shapes of unit cells called
- parallelepipeds
- What are the types of unit cells
- Primatice Cubic, Body centered cubic, Face-centered cubic
- How many atoms does a primitive cubic unit cell contain
- one
- How many atoms does a body centered cubic unit cell contain
- two
- How many atoms does a Face centered unit cell contain
- four
- What are the types of close packing of spheres?
- Hexagonal Close packing, cubic close packing
- What is the pattern for hexagonal close packing
- ABAB
- What is the pattern for cubic close packing
- ABCABC
- What type of unit cell does cubic close packing make
- face centered cubic
- What does "coordination #" mean
- The number of atoms that surround another atom
- What are the classes of crystalline solids?
- Ionic, Molecular, Metallic, Covalent Network
- What are the types of Covalent Network solids
- Sillica, Graphite, diamond
- What is a substitutional alloy?
- Some of the metal atoms are replaces by other metal atoms
- What is an interstitial alloy?
- Holes of one metal atom are filled with another atom
- What makes London Dispersion forces stronger
- Increasing molecular weight, increasing surface area
- What are the atoms that exhibit Hydrogen bonding
- F,O, N
- Why does water expand when it is frozen
- Because it is denser as a liquid than as a solid
- What is viscosity measured in
- Poise
- What is viscosity
- The resistance of a liquid to flow
- Liquid to gas
- Vaporization
- Gas to liquid
- Condensation
- Solid to Gas
- Sublimation
- Gas to Solid
- Deposition
- What is critical temperature
- The highest temp at which a substance can be in the liquid phase
- What is critical pressure
- The pressure that it takes to liquify a substance at its critical temp
- What is the formula for changing temperature
- H = (mass) (specific heat) (Change in Temp)
- What is specific heat measured in
- J/g-C
- What is the formula for a state change
- H= (Mass)(heat of fusion or heat of vaporization)
- When does a liquid boil
- When its vapor pressure equals the external pressure acting on the surface of the liquid