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