Definitions

Question 1

Enthalpy

Answer 1

All the stored energy in a chemical, given by symbol H

Question 2

Pure Covalent Bonding

Answer 2

Where the shared pair of electrons are shared equally by the atoms in the molecule

Question 3

Polar Covalent Bonding

Answer 3

Unequal sharing of the bonded electrons, creates a permanent dipole

Question 4

Electronegativity

Answer 4

Assesses an elements ability to attract bonding electrons

Question 5

Ionisation Energy

Answer 5

Energy required to remove an electron from every atom in a mole of atoms in its gaseous state

Question 6

Monatomic molecules

Answer 6

Substances that exist as individual non-bonded atoms

Question 7

Enthalpy of Combustion

Answer 7

Enthalpy change when 1 mole of a substance burns complete in its standard state

Question 8

Enthalpy of formation

Answer 8

Enthalpy change when one mole of a compound is formed from its elements in their standard states

Question 9

Oxidising agent

Answer 9

Accepts electrons from a reactant and so oxidises it

Question 10

Reducing agent

Answer 10

Supplies reactant with electrons therefore reducing it