I need step-by-step help solving an enthalpy problem. Galena is the ore from which elemental lead is extracted. Inthe first step of the extraction, galena is heated in air to formlead(II) oxide. 2PbS + 3O2 => 2Pb) + 2SO2 What masss of galena is converted to lead oxide if 975 kJ ofheat are liberated? I need step-by-step help solving an enthalpy problem. Galena is the ore from which elemental lead is extracted. Inthe first step of the extraction, galena is heated in air to formlead(II) oxide. 2PbS + 3O2 => 2Pb) + 2SO2 What masss of galena is converted to lead oxide if 975 kJ ofheat are liberated? What masss of galena is converted to lead oxide if 975 kJ ofheat are liberated?
Explanation / Answer
2PbS + 3O2 -------> 2PbO + 2SO2 The enthalphy change for the above reaction is H = - 835KJ Molar mass of PbS = 207 + 32 = 239 For the reaction of 2 * 239 g of PbS ( Galena) the enthalphyof the reaction is 835 KJ For the reaction of X g of PbS ( Galena) the enthalphyof the reaction is 975 KJ X = ( 2*239 * 975 ) / 835 = 558.143 g of galena