Level 2 Level 4
25 words 0 ignored
Ready to learn Ready to review
Check the boxes below to ignore/unignore words, then click save at the bottom. Ignored words will never appear in any learning session.
the heat content that is stored in a chemical system
(standard) enthalpy change of combustion
the enthalpy change that takes place when one mole of a substance reacts completely with oxygen under standard condition, all reactants and products being in their standard states.
(standard) enthalpy change of formation
the enthalpy change that takes place when one mole of a compound in its standard state is formed from its constituent elements in their standard states under standard conditions.
(standard) enthalpy change of reaction
the enthalpy change that accompanies a reaction in the molar quantities expressed the chemical equation under standard conditions, all reactants and products being in their standard states
a diagram showing alternative routes between reactants and products that allows the indirect deternimation of an enthalpy change from other known enthalpy changes using Hess' law.
enthalpy profile diagram
a diagram for a reaction to compare the enthalpy of the reactants with the enthalpy of the products.
the reaction of an alcohol with a carboxylic acid to produce an ester and water.
a reation in which the enthalpy of the products is smaller than the enthalpy of the reactants, resulting in heat loss to the surroundings (Delta H -ve)
the seperation of the components in a liquid mixture into fractions which differ by boiling point (and hence chemical composition) by means of distillation, typically using a fractionating column.
the process in mass spectrometry that causes a positive ion to split into pieces, one of which is a positive fragment ion.
the part of the organic molecule responsible for its chemical reactions
the simplest algebraic formula for a member of a homologous series.
giant covalent lattice
a three dimensional structure of atoms, bonded together by strong covalent bonds
giant ionic lattice
a three dimensional structure of oppositely charged ions, bonded together by strong ionic bonds
giant metallic lattice
a three dimensional structure of positive ions and delocalised electrons, bonded together by strong metallic bonds
the process in which the adsorption and subsequent emission of infrared radiation by atmospheric gases warms the lower atmosphere and the planet's surface
A vertical column in the Periodic Table. Elements in a group have similar chemical properties and their atoms have the same number of outer-shell electrons.
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.
a reaction in which the catalyst has a different physical state from the reactants; frequently, reactants are gases whilst the catalyst is solid.
the breaking of a covalent bond with both the bonded electrons going to one of the atoms, forming a cation (+ve ion) and an anion (-ve ion)
a reaction in which the catalyst and reactants are in the same physical state, which is most frequently the aqueous or gaseous state
a series of organic compounds with the same functional group, but with each successive member differing by CH2
the breaking of a covalent bond with one of the bonded electrons going to each atom, forming two radicals.
crystalline and containing water molecules
Organic compounds consisting of only carbon and hydrogen.