physical

Question 1

what are the redox oxidation numbers (plus exceptions) for hydrogen

Answer 1

usually +1
0 in H and H2
-1 in H- and NaH

Question 2

what are the redox oxidation numbers (plus exceptions) for oxygen

Answer 2

usually -2
0 in O and O2
-1 in H2O2
+2 in F2O

Question 3

what are the redox oxidation numbers (plus exceptions) for fluorine

Answer 3

usually -1
0 in F and F2

Question 4

define enthalpy change of formation

Answer 4

enthalpy change when 1 mol of a substance is formed from its elements in standard states under standard conditions (298K and 100kPa)

Question 5

define enthalpy of atomization

Answer 5

enthalpy change when 1 mole of gaseous atoms is made from an element in its standard states

Question 6

define ionisation energy

Answer 6

the amount of energy required to remove one mole of electrons from one mole of gaseous atoms to form one mole of gaseous ions

Question 7

define bond enthalpy

Answer 7

amount of energy required to break 1 mol of a covalent bond in the gas phase

Question 8

define lattice dissociation enthalpy

Answer 8

enthalpy change when 1 mole of a solid ionic compound is dissociated into its gaseous ions under standard conditions

Question 9

define lattice enthalpy of formation

Answer 9

enthalpy change when 1 mole of a solid ionic compound is formed from its gaseous ions under standard conditions