28.(1)-252.9(2分)(2)温度低于870K(2分)(3)0.15m0l·L-1·mn1(2分); (CH3OH)-(2分)(4)①<(2分)②>(2分)分【解析】本题主要考查化学反应原理,考查学生对化学反应原理的理解能力和综合运用能力。(1)由已知得H2(g)+2O2(g)—H1QO(D)△H2=-285.8kJ·mol反应aCH4(g)+202(g—CO2(g)+2H2O()△H2=-890.3kJ·mol反应ba×4-b得OO(g)+4H2(g)CH4(g)+2HO△H1=(-285.8×4)-(-890.3)=-2529(kJ·mo)。(2)△G<0时,反应才有自发性,故反应应在温度低于870K下进行。(3)结合图乙和化学方程式可判断,图乙中表示的是CO和CH3OH的物质的量浓度的变化,故用H2表示平均反应速率v(H2)=0.15mol·L·min-1(4)②等压下随温度的升高CO的转化率减小,说明正反应为放热反应,温度越高平衡常数越小,故KA>KC。③依据三段式计算:CO(g)+2H2(g)CH3OH(g)起始10mol20mol0变化量5mol10mol5mol平衡5mol10mol5mol体积为20L,KA=20×(92=4评分细则:(2)答“低温”给一分。(3)第一问,没有写单位扣一分,写错单位不给分。胞质基质线粒体和叶绿体补充细胞质基质线粒体和类囊体薄膜】(2分)【说明:答出

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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