CHEM154 FINAL

Ionization Energy Pattern

Ionization Energy Pattern

Up Right

Electron Affinity Pattern

Up Right

Lattice Energy Pattern

Up Right

Ionization Energy Pattern

Up Right

Atomic Radius Pattern

Down Left

LEO GER

Loss Electrons Oxidation
Gain Electrons Reduction

Red Cat

Reduction at Cathode which is positive

Calculating ECell

E cell = E (reduced) - E(Oxidised)

Balancing Half Reactions

Balance elements

Balance OH

Balance H

Balance e

Neutral Compound Ox Num

0

Ion Ox Num

Adds up to charge of ion

Free elements Ox Num

0

Fluorine Ox Num

-1

Group 1 Ox num Group 2 Ox num

1, 2

Hydrogen with Non-Metals

1

Hydrogen with Metals and Boron

-1

Oxygen except with Florine or Peroxides

-2

Group 17, 16, 15

-1, -2, -3

ΔG⁰ vs ΔGrxn

ΔG⁰ tells you the equilibrium position

ΔGrxn tells you spontaneity

Ecell spontaneity

E^ocell is positive the reaction is spontaneous

ΔH: +

S^{o: -}

ΔG: +

non spontaneous

ΔH: -

S^{o: +}

ΔG: -

spontaneous

ΔH: -

S^{o: -}

ΔG: - or +

spontaneous at low temp

ΔH: +

S^{o: +}

ΔG: - or +

spontaneous at high temp

bar to pa

*10^4

atm to pa

*101325

bond angles