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effusion
The process of a confined gas escaping through a tiny hole in its container.
electrical potential
A measurement of the ability of a voltaic cell to produce an electric current.
electrochemical cell
Any device that converts chemical energy into electrical energy or electrical energy into chemical energy.
electrochemistry
A branch of chemistry that deals with the interconversion of chemical energy and electrical energy.
electrode
A conductor in a circuit that is used to carry electrons to a nonmetallic part of the circuit.
electrolysis
The process in which electrical energy is used to cause a nonspontaneous chemical reaction to occur.
electrolyte
A compound that conducts an electric current when it is in an aqueous solution or melted.
electrolytic cell
The apparatus used for carrying out an electrolysis reaction.
electromagnetic radiation
Form of energy that exhibits wavelike behavior as it moves through space.
electromagnetic spectrum
All forms of electromagnetic radiation.
electron
Negatively charged subatomic particle present in all atoms.
electron affinity
The energy change that occurs when a neutral atom gains an electron.
electron configuration
Arrangement of all of the electrons of that atom.
electron domain geometry
Geometry based only one the total number of electron pairs around the central atom, both bonding pairs and lone pairs.
electron dot diagram
Diagram in which the valence electrons of an atom are shown as dots distributed around the element’s symbol.
electronegativity
Measure of the ability of an atom to attract the electrons when the atom is part of a compound.
electroplating
A process in which a metal ion is reduced in an electrolytic cell and the solid metal is deposited onto a surface.
element
Simplest form of matter that has a unique set of properties.
elementary step
One step in a series of simple reactions that show the progress of a reaction at the molecular level.
empirical formula
Formula that shows the elements in a compound in their lowest whole-number ratio.
emulsion
A colloidal dispersion of a liquid in either a liquid or a solid.
end point
The point during a titration experiment when the indicator changes color.
endothermic
Condition of a process where heat is absorbed by the system from the surroundings.
energy
Capacity to do work or to produce heat.
enthalpy
The heat content of a system at constant pressure.
entropy
A measure of the degree of randomness or disorder of a system.
enzyme
A protein that acts as a biological catalyst.
equilibrium constant (Keq)
The ratio of the mathematical product of the concentrations of the products of a reaction to the mathematical product of the concentrations of the reactants of the reaction, with each concentration raised to the power of its coefficient in the balanced chemical equation.
equivalence point
The point in a neutralization reaction where the number of moles of hydrogen ions is equal to the number of moles of hydroxide ions.
error
Difference between the experimental and accepted values of a measurement.
ester
An organic compound that is a derivative of a carboxylic acid in which the hydrogen atom of the hydroxyl group has been replaced with an alkyl group.
esterification
A reaction in which an ester is formed from an alcohol and a carboxylic acid.
ether
An organic compound in which two hydrocarbon groups are bonded to the same atom of oxygen.
evaporation
The conversion of a liquid to its vapor below the boiling temperature of the liquid.
excess reactant (reagent)
The reactant that is initially present in a greater amount than will eventually be reacted; some excess reactant is left over after the reaction is complete.
excited state
State of an atom where its potential energy is higher than the ground state.
exothermic
Condition of a process where heat is released by the system into the surroundings.
experimental value
Quantitative value of a measurement obtained during an experiment.
extensive property
Property that depends on the amount of matter in a sample.

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7 , 8

Date Created:

Apr 20, 2012

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Sep 04, 2014
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