All alkanes react with oxygen in a combustion reaction, although they become increasingly difficult to ignite as the number of carbon atoms increases.
ˈɔːl ˈælkeɪnz ɹɪˈækt wɪð ˈɑːksɪdʒən ɪn ɐ kəmbˈʌstʃən ɹɪˈækʃən, ɔːlðˈoʊ ðeɪ bɪkˌʌm ɪŋkɹˈiːsɪŋli dˈɪfɪkəlt tʊ ɪɡnˈaɪt æz ðə nˈʌmbɚɹ ʌv kˈɑːɹbən ˈæɾəmz ˈɪŋkɹiːsᵻz.