An FCC iron-carbon alloy initially containing 0.20 wt% C is carburized at an elevated temperature and in an atmosphere wherein the surface carbon concentration is maintained at 1.0 wt%. If after 49 h the concentration of carbon is 0.35 wt% at a position 3.7 mm below the surface, determine the temperature at which the treatment was carried out. You will need to use data in the two tables below to solve this problem.

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the answer is 75.0%.

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.

answersilicon (si); oxygen (o);