化学反应与热能
来源:学生作业帮 编辑:大师作文网作业帮 分类:化学作业 时间:2024/11/19 06:01:54
(重庆)SF6是一种优良的绝缘气体,分子结构中只存在S-F键。已知:1molS(s)转化为气态硫原子吸收能量280kJ,断裂1molF-F 、S-F键需吸收的能量分别为160kJ、330kJ。则S(s)+3F2(g)=SF6(g)的反应热△H为 A. –1780kJ/mol B. –1220 kJ/mol C. –450 kJ/mol D. +430 kJ/mol
解题思路: 反应热的计算
解题过程:
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最终答案:略
解题过程:
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最终答案:略