Box 0 8.5 Another type of fuel cell uses methanol instead of hydrogen.
Figure 7 represents the reaction in this fuel cell.
Figure 7
H
2H-C-0-H + 30=0
20=C=0 + 4H-O-H
H
I
Table 4 shows the bond energies for the reaction.
Table 4
C-H
C-O
O-H
O=0
C=O
412
360
464
498
Bond energy in kJ/mol
805
Calculate the overall energy change for the reaction.
Use Figure 7 and Table 4.
[3 marks]