A solid ore containing 82 wt% FeS₂ and 18 wt% inert is fed to a furnace. Dry air is fed in 40% excess of the amount theoretically required to oxidize all of the sulfur in the ore to SO3. A pyrite conversion of 85% is obtained, with 40% of FeS₂ converted to form sulfur dioxide and the rest forming sulfur trioxide. Two streams leave the roaster: a gas stream containing SO3, SO2, O2, and N₂, and a solid stream containing uncon- verted pyrite, ferric oxide (Fe₂O3), and inert. Using 100 kg/min of ore as a basis, calculate the rate of Fe₂O3 production (kg/min) in the outlet solid stream, and the total molar flow and composition of the outlet gas stream. The following reactions take place in the furnace: (46.5 kg) FeS₂ (s) + 15 O₂ (g) → Fe₂O3(s) + 4SO3 (g) 2 11 O₂ (g) → Fe₂O3 (s) + 4 SO₂ (g) 2 2FeS₂ (s) +-

Potassium fluotitanate (K₂TiF₆), a starting material forproducing other titanium salts, is made by dissolvingtitanium(IV) oxide in concentrated HF, adding aqueous KF, andthen heating to dryness to drive off excess HF. The impure solidis recrystallized by dissolving in hot water and then cooling to 0°C, which leaves excess KF in solution. For the reaction of 5.00 g of TiO₂, 250. mL of hot water is used to recrystallize theproduct. How many grams of purified K₂TiF₆ are obtained?(Solubility of K₂TiF₆ in water at 0°C is 0.60 g/100)

Blast furnace gas is a by-product in converting iron ore to metallic iron using metallurgical coke. A blast furnace gas extracted from a blast furnace is composed of 30% N2, 32% CO, 12% CO2, 8% H₂O and 18% H2. This fuel gas contains high carbon monoxide content and low heating value but can be used as fuel within the steel works and sometimes combined with natural gas to sustain combustion. If 100 mol of the fuel gas is burned with 250 mol of air, what is the percent excess air supplied?

Review | Constants | PeriIodic Table The standard heat of formation, Ar H°, is defined as the enthalpy change for the formation of one mole of substance from its constituent elements in their standard states. Thus, elements in their standard states have AfH® =0. Heat of formation values can be used to calculate the enthalpy change of any reaction. Part A For which of the following reactions is A,H° equal to Ar H° of the product(s)? Consider, for example, the reaction You do not need to look up any values to answer this question. 2NO(g) + O2(9) = 2NO2(9) Check all that apply. with heat of formation values given by the following table: • View Available Hint(s) Substance (kJ mol-1) NO(9) O C(s) + 02 (9)→CO2(9) 90.2 O2 (9) O Li(s) + F2(1)→LIF(s) NO2(9) 33.2 O Li(s) + F2(9)→LİF(s) O 2Li(s) +F2(9)→2LİF(s) Then the heat of formation for the overall reaction is A,H°= EnpAf H° (products)- nA¢H° (reactants) O CO(g) + ÷O2(9)→CO2(9) 2(33.2) [2(90.2) + 0] -114 kJ mol-1 O BaCO3(s)→BA0(s) + CO2(9)…