问题 填空题

(8分)糖类物质为很多生物生命活动提供能量。

(1)已知 45g葡萄糖在人体内完全氧化为二氧化碳和水,放出701KJ的热量,该反应的热化学方程式                                             

(2)以葡萄糖为燃料的微生物燃料电池结构如图所示,其负极反应为:                 .

电池工作过程中溶液中氢离子移动方向从     极区

移向          极区(填“正”或“负”)

(3)常温下,用上述电池惰性电极电解100L某浓的硫酸铜溶液,当溶液PH=1时停止电解,则理论上需要葡萄糖的质量为          。(假设溶液体积不变)

答案

(1)45g葡萄糖的物质的量为0.25mol;则1 mol葡萄糖在体内完全氧化将放出热量2840kJ;其反应的热化学方程式为:

(2)燃料电池的构造为:燃料通入负极,氧气或空气通入正极;工作的过程中,阳离子从负极区移向正极区;燃料电池工作时总反应方程式相当于燃料的直接燃烧,书写电离反应式为:先写总反应式,再写正极反应式,最后将总反应式减去正极反应式可得负极反应式;所以,其负极反应的电极反应式为:

(3)根据氧化还原反应过程中,得失电子数相等的原则,可得:上述电池惰性电极电解100L某浓的硫酸铜溶液,当溶液PH=1时停止电解,则理论上需要葡萄糖的质量为75g;

单项选择题
阅读理解

Mark was walking home from school one day when he saw the boy in front of him fall over and drop all of the books he was carrying, along with two sweaters, a basketball and a walkman(随身听). Mark stopped and helped the boy pick up these things. Since they were going the same way, he helped to carry some of his things. As they walked, Mark knew that the boy’s name was Bill, that he loved computer games, basketball and history, and that he was having lots of troubles with his other subjects and that he had just broken up with his girlfriend.

They arrived at Bill’s home first and Mark was invited in for a Coke and to watch some television. The afternoon passed happily with a few laughs and some small talk, and then Mark went home. They often saw each other at school, had lunch together once or twice, and then they both finished middle school. They ended up in the same high school where they sometimes saw and talked with each other over the years. At last just three weeks before they finished high school, Bill asked Mark if they could talk.

Bill asked Mark if he still remembered the day years ago when they had first met. “Did you ever think why I was carrying so many things home that day?” asked Bill. “You see, I cleaned out my locker(锁柜) because I didn’t want to leave anything for anyone else. I had put away some of my mother’s sleeping pills and I was going home to kill myself. But after we spent some time together talking and laughing, I began to understand that if I killed myself, I would have missed that time and so many others that might follow. So you see, Mark, when you picked up those books that day, you did a lot more. You saved my life.”

小题1:When Mark met him the first time, Bill was going _______.

A.to have a basketball game

B.to his classroom

C.to see Mark

D.back home小题2: From what Bill was carrying, we can know that he _______.

A.was a good student

B.liked sports and music

C.liked all the subjects in school

D.was a good friend小题3:Mark and Bill _______.

A.were in the same middle school and high school

B.were in the same middle school but not in the same high school

C.often had lunch together at school

D.had known each other before they began to study in middle school小题4:In this passage, the phrase “break up” means _______.

A.相处很好

B.和好如初

C.关系破裂

D.保持联系小题5:When Mark helped Bill to pick up some of his things, he _______.

A.knew he could save Bill’s life

B.knew who Bill was and wanted to help him

C.didn’t know why he was going to help him

D.didn’t know what he was doing was very important to Bill