n1 moli CH4 + Cl2 = CH3Cl + HCl
n2 moli CH4 + 2Cl2 = CH2Cl2 + 2HCl
n3 moli CH4 + 3Cl2 = CHCl3 + 3HCl
n4 moli CH4 + 4Cl2 = CCl4 + 4HCl
n5 moli CH4 nereactionat
n1 + n2 + n3 + n4 + n5 = n
n1/4 = n2/3 = n3/2 = n4/1 = n5/1 = n/11 ⇒ n1 = 4n/11 n2 = 3n/11 n3 = 2n/11 n4 = n5 = n/11
n1 = 8 4n/11 = 8 ⇒ n = 22 moli CH4pur V = 22·22,4 = 492,8 l
V imp. = 492,8·100/98 = 502,857 l