皮皮学，免费搜题
登录
logo - 刷刷题
搜题
【简答题】
甲醇是一种可再生能源，用途广泛，一种由甲醇、氧气以及强碱溶液制成的新型手机电池，容量达氢镍电池或锂电池的10倍．回答下列有关问题： （1）工业上有一种生产甲醇的反应： CO 2 （g）+3H 2 （g）?CH 3 OH（g）+H 2 O（g）△H=-49.0kJ?mol -1 在某温度下，容积均为1L的A、B两个容器中，按不同方式投入反应物，保持恒温恒容，经10秒钟后达到平衡，达到平衡时的有关数据如下表： 容器 A B 反应物投入量 1mol CO 2 （g）和3mol H 2 （g） 1mol CH 3 OH（g）和1mol H 2 O（g） CH 3 OH（g）浓度（mol?L -1 ） c 1 c 2 反应能量变化 放出29.4kJ 吸收akJ ①从反应开始至达到平衡时，A中用CO 2 来表示的平均反应速率为______． ②该温度下，反应CO 2 （g）+3H 2 （g）?CH 3 OH（g）+H 2 O（g） 的化学平衡常数的值为______． ③a=______． ④下列措施中能使n（CH 3 OH）/n（CO 2 ）增大的是______． A．升高温度        B．充入氢气 C．将水蒸气从体系中分离    D．用更有效的催化剂 （2）某同学设计了一个甲醇燃料电池，并用该电池电解200mL一定浓度的NaCl与CuSO 4 混合溶液，其装置如图1： ①写出甲中通入甲醇一极的电极反应式______． ②图2中曲线Ⅰ、Ⅱ分别表示两极所得气体的体积随时间变化的关系（气体体积已换算成标准状况下的体积），写出电解开始上的电极反应式______； t 1 后石墨电极上的电极反应式______；计算在t 2 溶液的pH为（忽略电解前后溶液体积的变化）______．
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案：
举一反三
【单选题】以下 不是 冲裁工艺方案所解决主要问题
A.
基本冲压工序的确定
B.
冲压工序的组合
C.
冲裁顺序的安排
D.
模具类型的选择
查看完整题目与答案
【判断题】进气门早开,增大了进气行程开始时气门的开启高度,增加了进气阻力,增加进气量。进气门晚关,延长了进气时间,在大气压和气体惯性力的作用下,增加进气量。
A.
正确
B.
错误
查看完整题目与答案
【单选题】In America, many people waste a lot of food _____ in Africa people haven’t enough to eat.
A.
however
B.
although
C.
as
D.
while
查看完整题目与答案
【单选题】When the inflation rate ends up being lower than expected,
A.
everyone benefits because money is cheaper.
B.
everyone benefits because price do not increase.
C.
lenders of fixed-rate mortgages generally benefit because they will make higher profits than they had calculated.
D.
borrowers with fixed-rate loans will benefit because their purchasing power will not decline as much.
查看完整题目与答案
【多选题】隔热条红太阳和
A.
隔热
B.
耳挖勺
C.
二位
D.
艺人额
查看完整题目与答案
【简答题】试述结核病的基本病变及其转化规律。
查看完整题目与答案
【多选题】4种常见又简单的站姿训练方法分别是?
A.
9点靠墙训练法
B.
双腿夹纸训练法
C.
顶物训练法
D.
照镜检测法
查看完整题目与答案
【简答题】试述结核病的基本病变及转化规律
查看完整题目与答案
【单选题】Many people didn't expect that very successful people______.
A.
can succeed in difficult tasks but fail in very simple ones
B.
aren't clear why they succeed in achieving their goals
C.
tend to feel very lonely when they reach their goals
D.
are born with some special ability to do something well
查看完整题目与答案
【简答题】短文该错 The village was always very quietly. The people living there were busy about working in their fields during the day and went to bed early at night, tiring after a long day 's hard work. All of th...
查看完整题目与答案
相关题目：
【单选题】以下 不是 冲裁工艺方案所解决主要问题
A.
基本冲压工序的确定
B.
冲压工序的组合
C.
冲裁顺序的安排
D.
模具类型的选择
查看完整题目与答案
【判断题】进气门早开,增大了进气行程开始时气门的开启高度,增加了进气阻力,增加进气量。进气门晚关,延长了进气时间,在大气压和气体惯性力的作用下,增加进气量。
A.
正确
B.
错误
查看完整题目与答案
【单选题】In America, many people waste a lot of food _____ in Africa people haven’t enough to eat.
A.
however
B.
although
C.
as
D.
while
查看完整题目与答案
【单选题】When the inflation rate ends up being lower than expected,
A.
everyone benefits because money is cheaper.
B.
everyone benefits because price do not increase.
C.
lenders of fixed-rate mortgages generally benefit because they will make higher profits than they had calculated.
D.
borrowers with fixed-rate loans will benefit because their purchasing power will not decline as much.
查看完整题目与答案
【多选题】隔热条红太阳和
A.
隔热
B.
耳挖勺
C.
二位
D.
艺人额
查看完整题目与答案
【简答题】试述结核病的基本病变及其转化规律。
查看完整题目与答案
【多选题】4种常见又简单的站姿训练方法分别是?
A.
9点靠墙训练法
B.
双腿夹纸训练法
C.
顶物训练法
D.
照镜检测法
查看完整题目与答案
【简答题】试述结核病的基本病变及转化规律
查看完整题目与答案
【单选题】Many people didn't expect that very successful people______.
A.
can succeed in difficult tasks but fail in very simple ones
B.
aren't clear why they succeed in achieving their goals
C.
tend to feel very lonely when they reach their goals
D.
are born with some special ability to do something well
查看完整题目与答案
【简答题】短文该错 The village was always very quietly. The people living there were busy about working in their fields during the day and went to bed early at night, tiring after a long day 's hard work. All of th...
查看完整题目与答案
参考解析：
知识点：
题目纠错 0
发布
创建自己的小题库 - 刷刷题