OCR Chemistry Definitions F322

A quiz to try and remember those damn definitions!

(N.B. Questions will usually contain more than one answer which is 'scientifically' correct, but I am using the definitions from the book - the definitions which you can be sure of getting the mark if you wrote them down in the exam)

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  • Created by: ImiT
  • Created on: 08-05-13 17:23
What is a radical?
A highly reactive species that contains a single unpaired electron
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What does standard state mean?
The physical state of a substance under standard conditions i.e. 298K and 100KPa
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What is a nucleophile?
An atom attracted to an electron-deficient atom where it donates a pair of electrons to form a new covalent bond
3 of 10
What are structural isomers?
Molecules with the same molecular formula but with different structural arrangement of atoms
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State le Chatalier's Principle
When a system in dynamic equilibrium is subjected to change, the position of equilibrium will shift to minimise the change
5 of 10
What is a functional group?
The part of the organic molecule that is responsible for chemical reactions
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What is Hess' Law?
If a reaction can take place by more than one route and the initial and final conditions are the same, the total enthalpy change is the same for each route
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What is an electrophile?
An atom that is attracted to an electron-rich centre/atom where it accepts a pair of electrons to form a new covalent bond
8 of 10
Describe homolytic fission
The breaking of a covalent bond, with one of the bonded electrons going to each atom, forming 2 radicals
9 of 10
What is Bond Enthalpy?
The enthalpy change that takes place when breaking by homolytic fission 1 mol 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

What does standard state mean?

Back

The physical state of a substance under standard conditions i.e. 298K and 100KPa

Card 3

Front

What is a nucleophile?

Back

Preview of the front of card 3

Card 4

Front

What are structural isomers?

Back

Preview of the front of card 4

Card 5

Front

State le Chatalier's Principle

Back

Preview of the front of card 5
View more cards

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