问题 填空题

在10 L的密闭容器中,进行如下化学反应:CO2(g)+H2(g)CO(g)+H2O(g) 其化学平衡常数K和温度t的关系如下表

请回答:

(1)该反应为_______(填“吸热”或“放热”)反应。

(2)该反应的化学平衡常数表达式为K=_______。

(3)能说明该反应达到化学平衡状态的是_______(填字母)。

a.υ正(CO2)=υ正(H2) b.υ逆(CO)=υ逆(H2O)

c.υ逆(H2)=υ逆(H2O) d.υ正(H2)=υ逆(H2

(4)某温度下,将CO2和H2各0.10 mol充入该容器中,达到平衡后,测得 c(CO) = 0.0080 mol/L ,则CO2

的转化率为________。

(5)某温度下,平衡浓度符合下式:c(CO2)·c(H2)=c(CO)·c(H2O),试判断此时的温度为

_______℃。

答案

(1)吸热

(2)

(3)d 

(4)80%

(5)830

阅读理解

阅读理解。

     Lack of parent willpower may contribute more to juvenile obesity than under-exercising or overeating.

     Research suggests that having overweight parents is a big influence (影响) upon a child's weight, with

one study finding that children with overweight parents were four times more likely to be overweight

themselves.

     The findings add heat to an already fierce political debate (争论) over childhood obesity. The Prime

Minister, John Howard, last week decided that $116 million be used for programs to deal with obesity,

while the Opposition Leader, Mark Latham, recently announced that his party would move to protect

children from unhealthy food advertisements.

     Clare Collins, a senior lecturer at the University of Newcastle, believes such programs will definitely fail

unless they influence the way of life of whole families. " If we can't get parents to take action against their

own weight problems, then we can't expect to influence their kids," she said.

     However, Professor Louise Baur from the Children's Hospital at Westmead, doubts whether adult

education programs offer any solution to weight problems." Many parents know they need to lose weight

and they know it influences their kids, but they lack the willpower to do anything about it."

     The 10-year study of 150 American children found two-thirds of children with overweight parents

became overweight. Only one in six children whose parents were of average weight became overweight.

     The president of the Australasian Society for the Study of Obesity, Associate Professor Gary Wittert,

said parents needed help in doing their job and the Opposition Party's policy (政策) might be on the right

track.

     " We know that driving without a seat belt is unsafe, so we make law against it," he said. " Obesity is

a major public health concern, so why shouldn't we change the law regarding unhealthy food ads?"

1. What does the underlined phrase " juvenile obesity" mean?

A. Adult education.

B. Childhood overweight.

C. Parents' influence.

D. Growing pains.

2. What is TRUE about the programs supported by the Prime Minister?

A. Debates on them will become less fierce.

B. They will be effective in dealing with obesity.

C. A large sum of money will be spent on them.

D. They will influence people's way of life.

3. Both Collins and Baur believe that overweight parents _____.

A. will come up with better solutions

B. will help with their children's education

C. should be more active in reducing weight

D. should carry out at least 10 years' study

4. According to some experts, the Opposition Party's policy _____.

A. can help fight against unemployment

B. may protect kids from unhealthy food ads

C. should be brought back to the right track

D. will work well to prevent traffic accidents

多项选择题