Question

Carbon reacts with oxgen forming carbon monoxide and/or carbon dioxide depending an availablity of oxygen. Find moles of each product obtained when `160gm` oxygen reacts with (a) 12 g carbon (b) 120 g carbon (C ) 72 g carbon.

Answer 1

(a)`{:(,C,+,(1)/(2)O_(2)rarr,CO,["initially use a reaction using lesser amount of oxygen "],),(t=0,1 mol,,5 mol,,,),(t = infty,0,,5-0.5 =,1mol,,),(,(LR),,4.5 mol,,,):}` Since `CO & O_(2)` are left `CO_(2)` is formed.
`{:(,CO,+,(1)/(2)O_(2)rarr,CO,),(t=0,10 mol,,4.5 mol,0,),(t = infty,0,,4 mol,1 mol,):}`
At end 1 mole `CO_(2)` & no `CO` present
(b) `{:(,CO,+,(1)/(2)O_(2)rarr,CO_(2),),(t=0,10mol,,5mol,0,),(t=oo,0,,0,10mol,):}`
At end only `10` mol `CO` present
(c) `{:(,CO,+,(1)/(2)O_(2)rarr,CO,),(t=0,6mol,,5mol,0,),(t=oo,0,,2mol,6mol,),(,[LR],,,,):}`
`{:(,CO,+,(1)/(2)O_(2)rarr,CO_(2),),(t=0,6mol,,2mol,0,),(t=oo,2mol,,0[LR],4mol,):}`
At end `[2mol CO + 4 mol CO_(2)]` left .