山西省长治市第九中学2018_2019学年高二化学上学期第一次月考试题(扫描版).doc

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1、 1 -山西省长治市第九中学 2018-2019 学年高二化学上学期第一次月考试题(扫描版)- 2 - 3 - 4 - 5 - 6 - 7 -高二年级化学(人)答案(一)1 2 3 4 5 6 7 8 9 10C D D B D C A A D A11 12 13 14 15 16 17 18 19 20D A C D C B D B C C2、非选择题(本题包括 4 小题,共 51 分)21 ((1) C(S)+H 2O(g)CO(g)+H 2(g)H=+131.5kJmol 1 (2) Fe 2O3(s)+3CO(g)=2Fe(s)+3CO 2(g)H=24.8kJ/mol (3) Hg

2、O(s)=Hg(l)+ O2(g)H=+90.7kJ/mol 22 2Al+6H +2Al 3+3H2 , 铝片上有大量气泡生成,铝片逐渐溶解 (2)下降 铝片与稀盐酸反应时放出热量,使锥形瓶内温度升高,气体压强增大 ,放热 23 (1) 环形玻璃搅拌棒 (2) 隔热 (3) 偏小 (4) 不相等 相等 因为中和热是指稀强酸与稀强碱发生中和反应生成 1 mol H2O 所放出的热量,与酸碱的用量无关 (5)偏小 偏小 (6) 3 24 (12 分) (1) 对于一些很难用实验方法直接测定热量变化的化学反应的反应热可以用“盖斯定律”间接测定 kJ/mol 25n(H 2) =0.2mol n(co)=0.20mol

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