key definitions

Question 1

what is meant by the term the mole

Answer 1

amount of substance that has the same number of particles as there are atoms in 12 grams of carbon-12

Question 2

what is meant by the term molecular formula

Answer 2

a chemical formula that gives the total number and type of atoms of each element present in a molecule

Question 3

what is meant by the term bond enthalpy

Answer 3

it is the energy required to break a particular covalent bond in one mole of molecule in a gaseous state

Question 4

what is meant by the term average bond enthalpy

Answer 4

it is the enthalpy change for the breaking of 1 mol of bonds in a gaseous molecule

Question 5

what does the term arene mean

Answer 5

it is an aromatic hydrocarbon with alternating double bonds in a ring-like structure

Question 6

what does the term aromatic mean

Answer 6

it refers to a stable, ring-shaped molecule with delocalized electrons,

Question 7

what does the term weak acid mean

Answer 7

it t refers to an acid that does not fully ionise H+ ions

Question 8

what does the term function group mean

Answer 8

when a compound has the same functional group with each successive member differing by a CH2