Define the first step in preparation of the metal lead from its ore is to roast the galena ore to make lead oxide
2PbS(s) + 3O2(g) =>2SO2(g) +2PbO(s)
Compute the standard enthalpy change for this reaction utilizing standard enthalpies of formation.
1. -857.9 Joules/mol PbO formed
2. -799.4 Joules/mol PbO formed
3. -602.2 Joules/mol PbO formed
4. -513.7 Joules/mol PbO formed
5. -417.9 Joules/mol PbO formed