题目:
已知下列热化学方程式:
(1)C(s,石墨)+O2(g)═CO2(g)△H=-393.5kJ•mol-1
(2)2H2(g)+O2(g)═2H2O(l)△H=-571.6kJ•mol-1
(3)2C2H2(g)+5O2(g)═4CO2(g)+2H2O(l)△H=-2599kJ•mol-1
请写出C(s,石墨)和H2(g)生成1mol C2H2(g)的热化学方程式______.
答案:
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