有A、B两份混合气体.A是烷烃R和足量氧气的混合气体,B是烷烃R、炔烃Q及足O2的混合气体,在标况下,各取A、B2.24

2个回答

  • (1)CnH2n+2+ O2→nCO2+(n+1)H2O

    1 1.5n+0.5 n (n+1)

    据题意:1+1.5n+0.5=n+n+1 n=1,R为CH4

    CnH2n-2+ O2→nCO2+(n-1)H2O

    1 1.5n-0.5 n (n-1)

    据题意:n+n-1-(1+1.5n-0.5)>0,n>3据题意,B为气体∴B为C4H6

    (2)设炔Q为XL,消耗O2为YL

    C4H6+5.5O2→4CO2+3H2O

    1 5.5 4 3 Δ0.5 解得:X=0.28(L)

    XL YL (2.38-2.24)L Y=1.54(L)

    则烷R和O2总体积:2.24-0.28-1.54=0.42(L)

    又设B中甲烷允许的最大体积为ZL

    CH4~2O2

    1 2 解得:(L)

    ZL 2ZL

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