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OutofC and COwhichisabetterreducingagentfor FeO (i) In thelower partofblast furnace (higher temperature) (ii)Intheupper part of blastfunace (lowertemperature ) |
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Answer» Solution :Althoughboth C and COcan reduce FeOtoFe, but C is abetterreducingatentthan CO in thelower partoftheblastfrunacewhere thetemperatureis high `(gt 1073 K) ` while CO isbetterreducingthat C in theupper partof theblastfurnace where thetemperatureis low`(lt 1073 K ` actually between500 -900 K ) as explainedbelow : (i)In thelowerpart of theblast FURNACE, temperatureishigh ( `gt 1073 K`).Above1073 K, the` Delta _fG^(@) `for COfromC ISMORE negativethan thatofFeO from Fe. Therefore, at high temperatures`(gt 1073 K)`, C caneasilyreduce FeO to Fe. `"" FeO + C overset (gt 1073 K) toFe + CO` (ii)However,in theupperpart ofblastfunace,temperatureis low ( ` lt 1073K` , actually between500 -900 K). Below 1073 K `Delta_f G^(@) ` of` CO_ 2 `from COIS more negativethat that ofFeO from Fe. Therefore, at lower temperatures `( lt1073K) ` , CO isabetterreducing agentthan C. ` ""FeO+CO overset (500 -900 K) to Fe+CO_ 2` |
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