The products of reduction process using carbon can be CO_2 or CO with increasing
ID: 105176 • Letter: T
Question
The products of reduction process using carbon can be CO_2 or CO with increasing temperature as given by the following two reactions: C(s) + O_2 (g) rightarrow CO_2 (g) 2C(s) + O_2(g) rightarrow 2CO (g) (a) What is temperature below which CO_2 will be more stable and thus will participate in the reduction process? (b) What is the minimum temperature for carbon to be able to reduce, SnO_2(s) and Cr_2O_3(s)? (c) Calculate the equilibrium p CO/p CO2 ratio at 1100 degree C for the following reaction, Mn O (s) + CO (g) rightarrow Mn (s) + CO_2 (g).Explanation / Answer
1.a)CO2will normally be stable till a temperature of 500degrees. It would stay without any further decomposition.
b)The minimum temperature for carbon to reduce is above 500-1100degree because upto 500degrees carbon would be stable without any change.
c)The equilibrium obtained at this temperature and pressure condition would be satisfied only when,the amount of CO2 present in the reactant side satifies the amount of CO2 in the product side.
d)Simply joining carbon as a link between two elements does not give the necessary product. Hence the necessary reaction should take place at prescribed temperature and pressure.
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