Question

For reduction of ferric oxide by hydrogen, Fe₂O₃(S) + 3H₂(g)→2Fe(s) +3H₂O(l)

∆H°₂₉₈ = -35.1 kJ.The reaction was found to be too exothermic to be convenient. It is desirable that ∆Ho should be at the most – 26kJ. At what temperature is it possible?

C_p[Fe₂O₃] = 104.5, C_p [Fe(s)] = 25.5,

C_p[H₂(l)] = 75.3, C_p [H₂(g)] = 28.9 (All in J/mol)

Answer 1

(9100/85.7) =  T–298

T_f = 404.18 K