皮皮学，免费搜题
登录
搜题
【简答题】
乙醇是重要的化工原料和液体燃料，可以利用下列反应制取乙醇： 2CO 2 （g）+6H 2 （g） 催化剂 . △ CH 3 CH 2 OH（g）+3H 2 O（g） （1）写出该反应的平衡常数表：K=______． （2）在一定压强和温度下，在反应物总物质的量相同的情况下，测得该反应的实验数据如下表： 温度/℃CO 2 转化率/% n（H 2 ）/n（CO 2 ） 500 600 700 800 1.5 45 33 20 12 2.0 60 43 28 15 3.0 83 62 37 22 ①该反应是______反应（填“吸热”或“放热”）． ②提高氢碳比[n（H 2 ）/n（CO 2 ）]，则CO 2 的转化率______；化学平衡______移动，平衡常数K______（填“增大”、“减小”、或“不变”）． （3）一种乙醇燃料电池中发生的化学反应为：在酸性溶液中乙醇与氧气作用生成水和二氧化碳．该电池的负极反应式为：______． 若以上述燃料电池为电源来电解饱和食盐水，当消耗46g乙醇时，电解产生的H 2 体积（标况）为______L． （4）25℃、101kPa下，H 2 （g）、C 2 H 4 （g）和C 2 H 5 OH（l）的燃烧热分别是285.8kJ?mol -1 、1411.0kJ?mol -1 和1366.8kJ?mol -1 ，请写出由C 2 H 4 （g）和H 2 O（l）反应生成C 2 H 5 OH（l）的热化学方程式______．
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】Why did the government use comics during the war?
A.
To increase the adult market for comics.
B.
To encourage sales of a domestic product.
C.
To enhance the confidence of the troops.
D.
To try to develop a better form. of entertainment for the troops.
【单选题】(Despite of) diligent effort to promote domestic production during the war years, the Continental Army (had to rely) primarily on (captures) and imports for (much) of its military hardware and even fo...
A.
Despite of
B.
had to rely
C.
captures
D.
much
【单选题】The professor said he wouldn’t attend the opening ceremony ____.
A.
unless was invited
B.
until inviting
C.
without inviting
D.
if not invited
【单选题】Fanning was made more difficult during the war because of drought and the scarcity of labor.
A.
Y
B.
N
C.
NG
【简答题】The professor said, " Light travels much faster than sound." The professor said that light __________ much faster than sound.
【简答题】Who helped the Olympians during the war?
相关题目：
参考解析：
知识点：
题目纠错 0
发布
