摘要:3.2800.则下列热化学方程式正确的是 A.2C2H2(g)+502(g)=4C02(g)+2H20(1),△H=+2600 B.C(s)+02,△H=-393.5 C.CH4(g)+202(g)=C02(g)+2H20(g),△H=-890.3 D.C6H1206(s)+302(g)=3C02(g)+3H20(1):△H=-1400

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