Combustion Reaction for Hydrogen:
2H2(g) + O2(g) à 2H2O(g) + Energy •H = ?
Reaction for the Decomposition of Water/Forming of Hydrogen:
2H2O(g) + Energy –> 2H2(g) + O2(g)
•H = ?
Enthalpy Change for the Combustion of Hydrogen:
•
Hc = ånHP -
ånHR
•
Hc = (2 mol * -241.8 kj/mol) - (2 mol * 0 kj/mol + 1 mol * 0 kj/mol)
•
Hc = -483.6kj
H = •H/n
H = -483.8 kj/2 mol
H= -241.8 kj/mol
•
HCH = nH
•
HCH = 2 mol * -241.8 kj/mol
•
HCH = -483.6 kj
