题目

Linda worked for the Minnesota Manufacturing and Mining Company, ____ as 3M. A. knowing                  B. known        C. being known              D. to be known 答案：B（1）已知：① TiO2(s)＋2Cl2(g)=TiCl4(l)＋O2(g)　ΔH＝＋140 kJ·mol－1②2C(s)＋O2(g)=2CO(g)　ΔH＝－221 kJ·mol－1写出TiO2和焦炭、氯气反应生成液态TiCl4和CO气体的热化学方程式：________________。（2）有一类甲醇质子交换膜燃料电池，需将甲醇蒸气转化为氢气，两种反应原理是：A．CH3OH(g)＋H2O(g)=CO2(g)＋3H2(g)　ΔH＝＋49.0 kJ·mol－1B．CH3OH(g)＋3/2O2(g)=CO2(g)＋2H2O(g)　ΔH＝－676.7 kJ·mol－1由上述方程式可知，CH3OH的标准燃烧热________(填“大于”“等于”“小于”或“不能确定”)－676.7 kJ·mol－1。已知水的气化热为44 kJ·mol－1，则氢气燃烧的热化学方程式为__________________________。