题目

根据下面地图,选择最佳答案。   1.There is _____________ in the place. A. a library and an old bridge        B. a school and a hotel C. a post office and a restaurant 2.The pay phone is ___________ the park. A. in        B. between        C. in front of 3.If you are at the pay phone, just go straight and turn left, you can see _______ on your right . A. a school           B. a library       C. a supermarket 4.Where is Mary’s house? A. It’s on Jiefang Street.             B. It’s on Shanghu Street. C. It’s be下列说法正确的是A.同温同压下,H2(g)+Cl2(g)==2HCl(g)在光照和点燃条件下的△H相同 B.铅蓄电池放电时的负极和充电时的阴极均发生还原反应C.已知:H2(g) + I2(g)2HI(g);△H =-9.48 kJ/mol,若将254g I2(g)和2gH2(g)充分反应可放出9.48 kJ的热量D.已知在101 kPa时,2 g碳燃烧生成CO放出热量为Q kJ,则碳的燃烧热为6Q kJ·mol-1  【解析】反应热与反应条件无关,A正确。铅蓄电池放电时的正极和充电时的阴极均发生还原反应,B错误。选项C中是可逆反应,所以254g I2(g)和2gH2(g)充分反应放出的热量小于9.48 kJ,C不正确。燃烧热是指在一定条件下,1mol物质完全燃烧生成稳定的氧化物时所放出的能量,因此D不正确。答案是A。
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