C6 fuel cells (part 1)

Page 1

20 SECTION C – Module C6 9

Fuel cells are used to make electricity. Look at the diagram. It shows what happens in a fuel cell. electricity unused hydrogen

hydrogen

FUEL CELL oxygen

H 2O unused oxygen

heat (a) In this fuel cell, hydrogen, H2, reacts with oxygen, O2. Water, H2O, is made. Write a balanced symbol equation for this reaction. .............................................................................................................................................. [2] (b) The reaction between hydrogen and oxygen is exothermic. Draw and label an energy level diagram for the reaction between hydrogen and oxygen

energy

progress of the reaction [2]

Š OCR 2015


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