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Select the option in which heat evolved is maximum. Given : Delta_(f)H^(@) (CO_(2), g) = -75 k Cal//mol, ""Delta_(f)H^(@) (CO, g) = -25 k Cal//mol The product will be CO if excess amount of carbon is present and CO_(2) if excess O_(2) is present |
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Answer» 10 moles of CARBON and 4.5 moles of `O_(2)` energy released `=9xx-25=-225` (b) `{:(C,+,1/2 O_(2),rarr,CO_(2),),(2,,2,,0,),(L.R.,,1,,2,DeltaH=-50),(CO+1/2 O_(2) rarrCO_(2),,,,,DeltaH=-100):}` `{:(2,,1,,2):}` Total `DeltaH=-150` (C) `{:(C,+,1/2O_(2),rarr,CO,),(4,,3.5,,0,),(L.R.,,1.5,,4,DeltaH=-25xx4=-100),(,,,,,),(CO,+,1/2O_(2),rarr,CO_(2),),(4,,1.5,,0,),(,,L.R.,,3,DeltaH-3xx50=-150),(,,,,,"Total "DeltaH=-250):}` (D) `{:(C,+,1/2O_(2),rarr,CO,),(2.5,,2.5,,0,DeltaH=-25xx2.5=62.5),(L.R.,,1.25,,2.5,),(,,,,,),(CO,+,1/2O_(2),rarr,CO_(2),),(2.5,,1.25,,0,DeltaH=-2.5xx50=125),(0,,,,2.5,),(,,,,,"total "DeltaH=62.5+125=187.5):}` |
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