like types of cells

Question 1

direct Contact for secondary/FUEL AND primary cells?

Answer 1

galvanic : two half equation occur seperately and not direct contact
fuels: half cells seprated in teh same vessel

Question 2

hydrogen fuel cells

Answer 2

fuel is alway oxidised at the anonde and oxygen is reduced at the cathode

Question 3

hydrogen fuel cell equations

Answer 3

oxidation: h2 –> 2h+ + 2e-
reduction: o2 +4 h+ + 4e- —> 2h2o

Question 4

what does hgiha dn low temps mean for electrolytic cells

Answer 4

high temperature: increases the possibility and rate of the side reactions therefore reducing amount of reactants available for recharge
low temperatures: increases the possibility of crystallisation of reactants which prevents operation of cell

Question 5

fuel cells

Answer 5

Electrode Properties:
Porous - allows reactants to diffuse through. Also provides a greater surface area for reactions to occur → increasing the power output
Inert - unreactive/does not participate in reaction
Catalyst - contains catalyst to speed up rate of reaction
Conductive - facilitates the flow of electrons through the electrode
-FUEL ALWAYS GETS OXISIDED
- much more efficient than combustion