6. A 3.25-g sample of sodium hydrogen carbonate reacts completely with sulfuric acid in a time of 20 s. Express the average rate of reaction as (a) mass of NaHCO3 consumed per second (b) mass of H2SO4 consumed per second amount of H2SO, consumed per second (d) amount of CO2 produced per second Student Worksheet Representing Enthalpy Changes, Extra Exercises LSM 5.3-2 - 1. Iron(II) sulfide ore is roasted according to the following chemical equation. 4 FeSs) + 7 O2(g) 2 Fe,036) + 4 SO2(g) AH. --2456 kJ (a) Rewrite this chemical equation including the energy as a term in the balanced equation. (b) What is the molar enthalpy for iron(II) sulfide in this reaction? (c) What is the molar enthalpy for iron(III) oxide in this reaction