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類題31從下列熱化學反應式,計算2C(s) + H2(g)→CzHz(g)的AH(J):
C2H2(g) + O2(g) → 2 CO2(g) + H2O(l)
5
+02(g)
C(s) + O2(g) → CO2(g)
H2(g) + O2(g) → H2O(l)
2
(A) - 227.2 (B) 227.2 (C) - 166.4 (D) - 620.6.
AH = - 1300 kJ
1.0
AH 393.5 kJ
AH = - 285.8 kJ
1300

Answer 1

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