An iron pyrite ore containing 85.0% FeS, and 15.0% gangue (inert dirt, rock, etc.) is roasted with an amount of air equal to 200% excess air according to the reaction 4FES2 + 1102 2FE2O3 + 8S02 in...

Extracted text: An iron pyrite ore containing 85.0% FeS, and 15.0% gangue (inert dirt, rock, etc.) is roasted with an amount of air equal to 200% excess air according to the reaction 4FES2 + 1102 2FE2O3 + 8S02 in order to produce SO.. All the gangue plus the Fe,0; end up in the solid waste product (cinder), which analyzes 4.0% FeS,. Determine the standard heat of reaction per kilogram of ore.