2022七上英语周报答案

28.(14分)(1)C(s)+CO2(g)=2CO(g)△H=+172kJ(2分)(2)①1(2分)60%或0.6(1分)②1molL(2分)(3)①2.83×104(1分)②M(1分)(2分)(4)1(2分)0.4(1分)【解析】(1)依据盖斯定律,由x(①-2×②)可得出C与CO2反应生成CO的热化学方程式为C(s)+CO2(g)=20g)AH×(△H1-2x△H2)=×[+466-2×(25)=+172 kJmol(2)①利用三段式CO(g)+H2O(g)CO (g)+H2(g)起始浓度/(molL)20反应浓度/(molL)平衡浓度/(molL)2-x3-x反应达平衡时,H2与H2O的体积分数之比为2:3。即x:(3-x)=2:3,x=1.2,K1.2×1.20.8×1.8CO的转化率=x=1.2100%=60%CO的转化率=x=12×1009÷-60%②该条件下,若CO和H2O均投入4mol,列三段式CO(g)+HO(g=CO2 (g)+H(g)起始浓度/(molL)2反应浓度/(molL1)a平衡浓度/(molL)2-a2aK=1,a=1,达平衡时,H2的浓度为1 mol-L(10-0.15)×10-3mol.I(3)①3s内的半均反应速率v(NO≈2.83×10molL②根据图中数据分析,使用M催化剂达到平衡的时间较短,用M效果更好些利用三段式2NO+2CO+N2+2CO起始量mol0反应量/mol平衡量/mol0.5xx根据图中压强变化可得(n-x+n-x+0.5x+x):2n=4:5,x0.8n,平衡时NO、CO、N2、CO2的分压分别为×40P、×400kP、×400kPa、2×400,则=、xx400×(2×402×400)2(。×400)225kPa(4)根据vkc(H2)e(CO),代入实验1、3的数据,可得a=1,再带入其中一组数据可得k=0.4

第一节One possible versionDear Ms JenkinsI'm writing to ask you for help. Our school is going to sponsor an exhibition of Chinese paintings in theschool library next month. As president of the student council, i have been assigned the job of drafting an arnouncement in English as there aredreds of international students in our schoohave already written a rough draft of the above-mentioned announcement. But I'm afraid that there aresome mistakes in the English language. So I am hoping you would correct my possible mistakes in the announce-ment that i have attachedId appreciate it if you could do me the favocerely yourLIH

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