F322 Definitions

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  • Created by: Mollieer
  • Created on: 01-06-14 11:02
Empirical Formula
The simplest whole number ratio of atoms of each element present in a compound
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Molecular Formula
The actual number of atoms of each element in a molecule
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General Formula
The simplest algebraic formula of a member of a homologous series
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Structural Formula
The minimal detal that shows the arrangement of atoms in a formula
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Displayed Formula
The relativ positioning of atoms and the bonds between them
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Skeletal Formula
The simplified organic formula, shown by removing hydrogen atoms from alkyl chains, leaving just a carbon skeleton and associated functional groups
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Homologous Series
A series of organic compounds having the same functional group but with each successive member differing by CH2
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Functional Group
A group of atoms responsible for the characteristic reactions in a compound
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Structural Isomers
Compounds with the same molecular formula but different strutural formulae
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Stereoisomers
Compounds with the same structural formula but with different arrangement in space
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E/Z Isomerism
An example of sterioisomerism, in terms of restricted rotation about a double bond an the requirement for two different groups to be attached to each carbon atom of the C=C bond
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Cis-Trans Isomerism
A special case of E/Z isomerism in which two of the substituent groups are the same
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Curly Arrow
The movement of an electron pair, showing either breaking or formation of a double bond
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Hydrocarbon
A compound of hydrogen and carbon only
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Radical
A species with an unpaired electron
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Electrophile
An electron pair acceptor
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Nucleophile
An electron pair donor
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Activation Energy
The minimum energy required to start a reaction by the breaking of bonds
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Standard Conditions
100kPa, 1.0 mol/dm^3, 25C
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Enthalpy Change of Reaction
The enthalpy change that occumpanies a reaction in the molecular quantities expressed in a chemical equation under standard conditions, all reactants and products being in their standard states
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Enthalpy Change of Combustion
The enthalpy change that takes place when one mole of a susbtance reacts completely with oxygen under standard conditions, all reactants and products being in their standard states
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Enthalpy Change of Formation
The enthalpy change that takes place when one mole of a compound is formed from its contituent elements in their standard states under standard conditions
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Le Chatelier's Principle
When a system in dynamic equlibrium is subjected to change, the position of the equlibrium will shift to minimise change
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Avarage Bond Enthalpy
The average enthalpy change that takes place when breaking by homolytic fission 1 mole of a given type of bond in the molecules of a gaseous species
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Other cards in this set

Card 2

Front

The actual number of atoms of each element in a molecule

Back

Molecular Formula

Card 3

Front

The simplest algebraic formula of a member of a homologous series

Back

Preview of the back of card 3

Card 4

Front

The minimal detal that shows the arrangement of atoms in a formula

Back

Preview of the back of card 4

Card 5

Front

The relativ positioning of atoms and the bonds between them

Back

Preview of the back of card 5
View more cards

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