2022～2英语周报答案

18.(11分,除标注外,每空1分)(1)CHOH()+O2(g)=CO2(g)+2H2O()△H=-726.6kJ·mol(2分)(2)①p1 ②4.0MPa2(2分)(3)①正向进行②23-20(2分)(4)CH3OCH3-12e+140H=2HCO3+9H2C【解析】本题考查工业上利用CO和H2在催化剂的作用下合成甲醇的反应原理,涉及盖斯定律、化学平衡常数的计算、化学平衡的移动、燃料电池等知识点。催化剂(1)根据题意,可列如下热化学方程式:①C0(g)+2H2(gCH3OH(1)△H=-128.0kJ·md;②H2(g)+202(g)=Ho()△H=-285.8kJ·mol':③CO(g)+202(g)=CO2(g)△H=-283.0kJ·mol-。由盖斯定律知,②×2+③①得到:CH1OH(D+302(g)=C02(g)+2H2O(1△H=726.6kJ·moll(2)①该反应的正反应是一个气体分子数减少的反应,压强增大,平衡向正反应方向移动,H2的平衡转化率增大,故P1 。②根据题意结合图像可列三段式:催化剂Co (g)+ 2H2(g)-CH, oH(g)起始量/mol3.06.00转化量/mol1.56.0×50%平衡量/mol3.01.5同一容器中,气体的体积分数等于物质的量分数,平衡时气体总压强为1.0MPa,则平衡时p(CO)1.5+3.0+1.5×1.0MPa=3.00.25MPa、P(H2)=1.5+3.0+1.5×1.0MPa=0.5MPa1.5P(CH, OH)1.5+3.0+1.5x1.0MPa=0.25MPa,故kP(CH, OH)0. 25 MPaP(CO)xP(,)0.25 MPa x(0.5 MPa)2-4.0 MPac( CH, OH)(3)①温度为T,反应平衡时,=2,则k=c(CO0)·e(H2)2.0K=1.5,Q≈1.33

第二节书面表达【写作思路】根据试题要求,考生需要写一篇记叙文,记述身边一位值得尊敬和爱戴的人。首先考生需要介绍自己最尊敬和爱戴的人是谁,简单地介绍一下他(她)。然后,陈述为什么他(她)值得尊敬和爱戴。最后,可以对前文进行一个总结,使文章结构严谨。本文的写作重点在"尊敬和爱戴的原因",考生可围绕这个要点适当拓展,从性格特点、处事风格等方面展开写作。【范文赏读】The most beloved and respected person around me is my teacher, Ms LiThough she has been teaching English for twenty years, she is still passionateabout teaching. She is kind and considerate towards us just like our dear motherWe all respect her because she always tries new ways to make her classes livelyand interesting. Hardworking and knowledgeable, she is one of the best teachersin our school. When we have a problem, we will turn to her for help. She alwaystalks to us patiently and helps us to find a solution. In our eyes, she is not onlyour teacher, but also our best friend. Those are why she deserves our respect【亮点词句】亮点词汇: beloved, respected, be passionate about, be consideratetowards, turn to sb. for help, in one's eyes亮点句式:Why引导的表语从句( why she deserves our respect)

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