2022英语周报高二课标第九答案

19.(1)-129kJ/mo(1分)(2)①25%(2分)②大(1分)该反应为放热反应,随着Y值的增大,c(CH3OH)减小,平衡CO(g)+2H2(g)=CH3OH(g)向逆反应方向进行,故Y为温度(2分)3)4×10-(1分)2.5×10-(1分)(4)①小于(1分)②H(1分)1(1分)减小(的投料比(1分)n(SO)解析:(1)①COg)+(O2(g)=CO2(g)△H1=-2841/mol;②H(g)x()2(g)第10页(共6页)H, O(g) AH,--248 kJ/mol: OCH,OH()+ 20:()=CO:(g)+2H,O(g)△H2=-651kJ/mol;将方程式①+2②-③得CO(g)+2H(g)=CH,OH(g)△H=(-284-2×248+651)kJ/mol=-129kJ/mol;(2)该反应的正反应是放热反应,升高溫度平衡逆向移动,甲醇的含量减小,增大压强平街正向移动,甲醇含量增大,所以X表示压强、Y表示温度,①平衡时,M点CH1OH的体积分数为10%同一容器中体积分数等于其物质的量分数,设消耗的n(CO)=xmol可逆反应CO(g)+2H2(g)=CHOH(g)开始(mol)1l反应(mol).r0xx平衡(mo)1-x2-2x平衡时甲醇的体积分数为10%,其物质的量分数也是10%,所以-x+2-2x+x)m100%=10%,x=0.25,则CO的转化年一n(初始)十n(反应)100%=向)m×100%=25%;②X表示压强,温度一定时增大压强平街正向移0.25m动,甲醇含量增大,压强:b>a,则甲醇含量b>8;该反应的正反应是放热反应,升高温度平衡逆向移动,甲醇含量降低,根据图知,Y越大甲醇含量降低,所以Y表示温度;(3)常温下PbI2饱和溶液(呈黄色)中c(Pb2)=1.0×10-4mol·L-1,c(I)2c(Pb2+)=2.0×10-mol·L-1,则K(Pbl2)=c(Pb2-)×a2(I-)=(1.0×10-3×(2.0×10-)2=4×10-3;K(PbCl2)=1.6×10-,则转化反应Pb1(s)+2CK(PbI,(aq)=PbCl2(s)+2(aq)的平衡常数K=c(1)=((CI") Kc(Pbt)4×102.5×10-4;(4)①升高温度HI的物质的量减小,氢气的物质的量增加说明平衡逆向移动,升高温度平衡向吸热方向移动,则正反应为放热反应,则△H<0;②根据图知,b从0逐渐增大a和c始终不变,且a、c的物质的量之比为3:1,根据SO2+12+2H2O==3H++HSO+2I、12+I1,反应中1越来越多H+、HSO始终不变,且n(H-):n(HSO1)=3:1,所以a为H+、b为1;由图2知,横坐标数值越大l越多、I越少,要提高碘的还原率需要控制温度外,还需要减的投料比n(SO,)

读后縷写【参考范文】We made up our minds to save the nurse with him together.We were faced with falling rubble from time to time. The trappednurse was still alive. We focused our efforts on removing thebricks and the rubble that trapped her body. Once she was freethe doctor guided us through the remains safely. He kept a perfectly caim tone throughout, which smoothed me much. My hearleaped with joy as we successfully walked out of the building. Althe survivors' gratitude was profound and boundless.Later in the afternoon I had time to Look around, and satthe destroyeed building. My beautifui workplace now lay beyonrecognition. The only thing that remained was broken wallsmidst the dim dust. I felt a weignt on my chest as the sednswelled inside. The doctor stood beside me and said with a fsmile,"We should be happy for those who survived the eartquake."I smiled back as the wind danced around us, and Ilucky to be alive.

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