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已知下列反应与其相应的热力学数据： CaCO3(s)===CaO(s) + CO2(g) △fHmθ(298．15 K)／(kJ.mol-1) 一1 206．92 一635．09 一393．5 问：(1)反应的标准摩尔焓变是多少? (2)若使反应在冲天炉中进行，分解100 kg的CaCO3相当于要消耗多少千克焦炭?(设焦炭的发热值为28 500 kJ.kg-1；CaCO3相对分子质量为100)
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