已知平衡:①C2H4(g)C2H2(g)+H2(g),②2CH4(g)C2H4(g)+2H2(g)。当升高温度时,①和②式皆向右移动。(1)C(s)+2H2(g)CH4(g) H1(2)2C(s)+H2(g)C2H2(g) H2(3)2C(s)+2H2(g)C2H4(g) H3下列有关(1)、(2)和(3)中的H1、H2、H3大小顺序排列正确的是
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