Tron hai the tich bang nhau cua C3H8 va O2 roi bat tia lua dien de dot chay hon hop. Sau do nguoi ta lam lanh hon hop cac san pham thu duoc roi dua ve dieu kien ban dau (hoi nuoc ngung tu). Moi quan he giua the tich hon hop sau phan ung ( V' ) voi hon hop ban dau ( Vo ) la A. V' = (7/10)Vo B. V' = (3/10)Vo
C. V' = (4/10)Vo D. V' = (6/10)Vo