Only N_2,CO and CO_2 gases remain after 0.72 gm of carbon is treated with one litre of air at 27^@C and 4.92 atm pressure.Assume air composition O_2=20%,N_2=79%,and CO_2=1% (by volume).The heat evolved (in Kcal) under constant pressure is : Given : C+OtoCO_2, DeltaH=-100 Kcal/mol C+1/2O_2toCO, DeltaH=-25 Kcal/mol

Only N_2,CO and CO_2 gases remain after 0.72 gm of carbon is treated w

1.	Only N_2,CO and CO_2 gases remain after 0.72 gm of carbon is treated with one litre of air at 27^@C and 4.92 atm pressure.Assume air composition O_2=20%,N_2=79%,and CO_2=1% (by volume).The heat evolved (in Kcal) under constant pressure is : Given : C+OtoCO_2, DeltaH=-100 Kcal/mol C+1/2O_2toCO, DeltaH=-25 Kcal/mol
Answer» SOLUTION :`n_(AIR)=(4.92xx1)/24.6=0.2` mol `n_(O_2)=0.2xx0.2=0.04 mol, n_c=0.72/12` `{:(,C" "+,1/2O_2,toCO),("initial MOLE",0.06,0.04,"" 0),("final mole",0,0.01,""0.06):}` `{:(,CO" "+,1/2O_2,toCO_2),("initial mole",0.06,0.01,"" 0),("final mole",0.04,0,""0.02):}` Heat evolved =`0.04xx25+0.02xx100=1+2=3 kcal`