Chemical And Fuel Cells Flashcards
1
Q
Chemical cells
A
Voltage produced depends on the type of electrodes electrolyte used. The greater the difference in reactivity between metals, the greater the voltage.
2
Q
Fuel cells
A
2H2 + O2 —> 2H2O (oxidation of hydrogen produces a voltage)
-O2 gas is supplied to the anode and gains electrons to form OH- (O2 + 2H2O + 4e- —> 4OH-)
-H2 gas is supplied to the cathode and reacts with OH- to form water (2H2 + 4OH- —> 4H2O + 4e-)
3
Q
Hydrogen as a fuel
A
-only waste product is water
-don’t need to use electricity to recharge
-flammable
-hard to compress
-sometimes produced from fossil fuels