CH3-CH3 + 7/2O2 --> 2CO2 + 3H2O + Q
CH3-CH2-CH3 + 5O2 ---> 3CO2 + 4H2O + Q
n=V/Vm=5.6/22.4=0.25mmoli amestec
n=m/M=30.8/44=0.7 mmoli amestec CO2
x+y=0.25 |||(-2)==>-2x-2y=-0.5
2x+3y=0.7 ==>2x+3y=0.7
/ y=0.2 mmoli si x+0.2=0.25==>x=0.25-0.2==>x=0.05 mmoli
n=V/Vm==>V=n*Vm=0.05*22.4=1.12 mL etan
%C2H6=VC2H6/Vamestec*100=1.12/5.6*100=20%