A lead ore, galena, consisting mainly of lead (II) sulfide, is the principal source of lead. To obtain the lead, the ore is first heated in the air to form lead oxide: (a) PbS(s)+3/2 O2(g) -> PbO(s)+SO2(g) ∆H=-415.4 kJ The oxide is the reduced to metal with carbon (b) PbO(s)+C(s) -> Pb(s)+CO(g) ∆H= 108.5kJ Calculate the enthalpy change for the reaction of one mole of lead(II) sulfide with oxygen and carbon, forming lead, sulfide dioxide and carbon monoxide. PbS(s)+3/2 O2(g)+C(s) -> Pb(S) +CO(g)+ SO2(g)  ∆H=?

Introduction to Chemical Engineering Thermodynamics
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Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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A lead ore, galena, consisting mainly of lead (II) sulfide, is the principal source of lead. To obtain the lead, the ore is first heated in the air to form lead oxide:
(a) PbS(s)+3/2 O2(g) -> PbO(s)+SO2(g) ∆H=-415.4 kJ
The oxide is the reduced to metal with carbon
(b) PbO(s)+C(s) -> Pb(s)+CO(g) ∆H= 108.5kJ

Calculate the enthalpy change for the reaction of one mole of lead(II) sulfide with oxygen and carbon, forming lead, sulfide dioxide and carbon monoxide.
PbS(s)+3/2 O2(g)+C(s) -> Pb(S) +CO(g)+ SO2(g)  ∆H=?

 

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