由下列数据确定反应 2C (s) + H 2 (g) → C 2 H 2 (g) 的△H θ 为( )。 C 2 H 2 (g) + 2 O 2 (g) → 2 CO 2 (g) + H 2 O (l) △H θ = -1301 kJ / mol C (s) + O 2 (g) → CO 2 (g) △H θ = - 394 kJ / mol H 2 (g)+ O 2 (g) ® H 2 O (l) △H θ = - 285.8 kJ / mol
A.
227.2 kJ / mol
B.
621.4 kJ / mol
C.
130.6 kJ / mol
D.
- 2375 kJ / m
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