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Chapter 1 Chem cards
midterm flashcards
47
Chemistry
Undergraduate 1
10/15/2011

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Cards

Term
Properties of Solids
Definition

-rigid shape, fixed volume

-external shape can reflect particles arrangement

-behavious is reasonably well understood

Term
Properties of gases
Definition

expand to fill container

behaviour is well understood (&simple)

Term
Properties of Liquids
Definition

-fluid shape but fixed volume

-behaviour is not well understood (complicated)

Term
Chemical Elements
Definition
Pure substances taht can't be subdivided into any other substances (composed of only one kind of atom)
Term
Compounds
Definition

Pure substances that require chemical means to be further subdivided

-can't separate into parent elements via physical separation methods

-building blocks composed of 2 or more elements

Term
Covalent Compounds
Definition
Molecule=atoms bonded together into discrete unit
Term
Ionic Compound
Definition
Ion=electrically charged atoms or groups of atoms
Term
Potential Energy
Definition
Energy associated with position
Term
Gravitational Energy
Definition
Potential Energy -- an object held at a height ie. waterfalls
Term
Chemical Energy
Definition
Potential Energy -- Energy stored in molecular bonds
Term
Electrostatic Energy
Definition

Potential energy -- energy due to attractions between 

charged or partially charged particles

Term
Nuclear Energy
Definition

Potential Energy -- energy associated with attractions between 

nuclear particles (released via fission, fusion)

Term
Kinetic Energy
Definition
Energy of motion
Term
Mechanical Energy
Definition
Kinetic Energy -- movement of a macroscopic object
Term
Thermal Energy
Definition
Kinetic Energy -- Motion at the particulate level
Term
Electric Energy
Definition
Kinetic Energy -- movement of electrons in a conductor
Term
Acoustic Energy
Definition
Kinetic Energy -- compression-type wave motion
Term
Fast motion at the particulate level creates...
Definition
heat
Term
The coldest state of matter is
Definition
solids because of low kinetic energy
Term
What causes a phase change?
Definition
A change in temperature
Term
Sublimation
Definition
Solid to gas
Term
deposition
Definition
Gas to solid
Term
fusion
Definition
solid to liquid
Term
Solidification
Definition
liquid to solid
Term
Evaporation
Definition
Liquid to Gas
Term
Condensation
Definition
Gas to liquid
Term
Qualitative Observation
Definition
describing things
Term
Colour, Odor, state of matter, appearance, melting/boiling point, solubility, electrical conductivity, malleability, ductility, viscosity, and density are all examples of...
Definition
Physical Properties
Term
Heterogeneous matter
Definition

-non-uniform in appearance

-always a mixture of substances

Term
Homogenous matter
Definition

-uniform in appearance

-could be a mixture

Term
Solution
Definition

-Uniform mixture of substances

-Widely variable composition

 

--Homogeneous mixtures

Term
Pure Substance
Definition

-fixed composition

-Cannot be further purified

 

--Homogeneous mixture

Term
Name a way to separate a heterogeneous mixture
Definition

Filtration

 

Term
Name one way to separate a homogeneous mixture
Definition

Distillation

Chromatography

Term
Explain Chromatography
Definition

-physical method of separating a homogeneous mixture

-used to test purity

-uses filter paper and ink

Term
Describe physical change
Definition
a change in the organization of atoms/molecules/ions
Term
Chemical Change
Definition

A change in the composition of atoms/molecules/ions

-changed substance

Term
Name examples of physical change
Definition

-melting butter

-dissolving sugar

-boiling water

Term
Give examples of chemical changes
Definition

burning butter

digesting sugar

reacting water with Na(s)

Term
quantitative observations
Definition
measuring things
Term
intrinsic properties
Definition

Characteristics of the substance itself, not the quantity

 

-Density

• Melting point

• Boiling point

• Viscosity  etc…

Term
Extrinsic properties
Definition

Properties that depend on the quantity of substance present

 

Mass

• Volume

• Length, width, height…

Term
how do you convert celsius to kelvin?
Definition
Tk=Tc +273.15k
Term
what is absolute zero?
Definition

0 degrees kelvin

 

no motion at the particulate level

Term
Give the equation for density
Definition
P=M/v
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