Chemistry Definitions

Cards covering key words and definitions for F322

HideShow resource information

Hydrocarbon

A compound containing carbon and hydrogen only.

1 of 24

Homologous Series

A series of organic compounds with the same functional group but with each successive member differing by CH2.

2 of 24

Functional Group

A group of atoms that are responsible for the characteristic reactions of a compound

3 of 24

Saturated

Contains single C-C bonds

4 of 24

Unsaturated

Containing at least one carbon to carbon multiple bond

5 of 24

Empirical Formula

The simpliest whole number ratio of atoms of each elements present in a compound

6 of 24

Molecular Formula

The actual number of atoms of each element in a molecule

7 of 24

Structural Isomer

Compounds with the same molecular formula but with a different structural formulae

8 of 24

Stereoisomerism

Compounds with the same structural formula but with a different arrangement of atoms in space

9 of 24

E/Z Isomerism

An example of stereoisomerism in terms of restricted rotation about a double bond and the requirement for two different groups to be attached to each carbon of the C--C group

10 of 24

Cis-Trans Isomerism

A special case of E/Z isomerism in which two of the substituent groups are the same

11 of 24

Catalytic Cracking

The breaking of a long chained saturated hydrocarbon to form more useful alkanes (shorter chained) and alkenes.

12 of 24

Biofuel

A fuel that is derived from recently living material such as plants or the waste of animals

13 of 24

Radical

A reactive species with an unpaired electron

14 of 24

Homolytic Fisson

The breaking of a covalent bond where the shared pair of electrons are split equally forming two radicals

15 of 24

Exothermic

Heat is given out to the surroundings (the reactants loose energy)

16 of 24

Endothermic

Heat is taken from the surrounding, the reactants gain energy

17 of 24

Activation Energy

the minimum enery required to start a reaction by the breaking of bonds

18 of 24

Standard Conditions

A pressure of 1 atmosphere, a stated temperature usually 25^c and a concentration of 1 mole. 

19 of 24

Standard Enthalpy Change of Reaction

The enthalpy change that accompanies a reaction in the molar quantities expressed in the chemical equation (under standard conditions, all reactants and products are in their standard states)

20 of 24

Standard Enthalpy Change of Formation

The standard enthalpy change that takes place when one mole of a compound is formed from its constituent elements (in their standard states under standard conditons)

21 of 24

Standard Enthalpy Change of Combustion

The standard enthalpy change that takes place when 1 mole of a compound reacts completely with oxygen ( all products are in their standard states under standard conditons)

22 of 24

Average Bond Enthalpy

The average enthalpy change is required to break 1 mole of a gaseous covalent bond by homolytic fission.

23 of 24

Catalyst

Speeds up a reaction without being consumed in the overall reaction.

24 of 24

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all resources »