题目内容
| 298K时 Ca(s) + C(s,石墨)+ 3/2O2(g)= CaCO3(s) △H1＝-1206．8kJ·mol-1 ① Ca(s) + 1/2O2(g)= CaO(s) △H2＝-635．1kJ·mol-1 ② C(s,石墨)+ O2(g)= CO2(g) △H3＝-393．5 kJ·mol-1 ③ 计算CaCO3(s) = CaO(s) + CO2(g) △H4＝ ? |
A．+178．2 kJ·mol-1 B．-178．2 kJ·mol-1 C．+287．2 kJ·mol-1 D．-287．4 kJ·mol-1 |
试题答案
A
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