Question

13.7 A piece of iron is to be heat treated at 1000 K in a CO-CO,-H2O-H2 gas mix- ture at 1 atm pressure. The gas mixture is produced by mixing CO2 and H2 and allowing the equilibrium CO, + H, CO + H,O to establish. Calculate (a) the minimum H2/CO, ratio in the inlet gas which can be admitted to the furnace without oxidizing the iron, (b) the activity of carbon (with respect to graphite) in the equilibrated gas of this initial minimum H,/CO, ratio, (c) the total pressure to which the equilibrated gas would have to be raised to saturate the iron with graphite at 1000 K, and (d) the effect, on the partial pressure of oxygen in the equilibrated gas, of this increase in total pressure.

Answer 1

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