摘要：8．已知在25oC.101kPa下.1g C8H18燃烧生成二氧化碳和液态水时放出48.40kJ热量.表示上述反应的热化学方程式正确的是 A．C8H18(l)+25eq \o(\s\up 3(-O2(g)= 8CO2(g)+9H2O(g),ΔH = -48.40kJ/mol B．C8H18(l)+25eq \o(\s\up 3(-O2(g)= 8CO2(g)+9H2O(l),ΔH = -5518kJ/mol C．C8H18(l)+25eq \o(\s\up 3(-O2(g)= 8CO2(g)+9H2O(l),ΔH = +5518kJ/mol D．C8H18(l)+25eq \o(\s\up 3(-O2(g)= 8CO2(g)+9H2O(l),ΔH = -48.40kJ/mol

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