2022英语周报八年级上第2答案

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

书面表达One possible version:NOTICEA sports meeting will be held in the playground of our school from next Thursday to FridayAs you know, the pressure of study is very heavy now, especially for those senior 3. So the purpose of the sports meeting is to letevery student get relaxed, as a result of which we students can live happily and heal thilyEveryone is welcome to take part in it. Those who perform excellently at the sports meeting will get prizes. But don' t take theresults so serously because taking part is more important than the result. Good luck to everyone!

以上就是2022英语周报八年级上第2答案，更多英语周报答案请关注本网站。