Define the first step in preparation of the metal lead from, Chemistry

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Define the first step in preparation of the metal lead from

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

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