In: Chemistry
lead (2) sulfide is the principle source of lead metal. to obtain the metal, the sulfide is first heated in air to produce pbo.
PbS+3/2O2------------>PbO+ SO2 H= - 415.4 kj ------------> 1
PbO + C-----------> Pb + CO H=108.5 KJ -------------> 2
Adding two equations
PbS+3/2O2------------>PbO+ SO2 H= - 415.4 kj ------------> 1
PbO + C-----------> Pb + CO H=108.5 KJ -------------> 2
----------------------------------------------------------------------------------------------------
PbS + 3/2O2 + C --------> Pb + SO2 + CO H = -306.9KJ >>>>answer