在一定体积的密闭容器中进行如下反应:CO2(g)+H2(g)⇌CO(g)+H2O

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问题:

在一定体积的密闭容器中进行如下反应: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:

t℃70080083010001200
K0.60.91.01.72.6
回答下列问题:

(1)该反应的化学平衡常数表达式为K=______.

(2)该反应为______反应(选填“吸热”或“放热”).

(3)能判断该反应是否达到化学平衡状态的依据是______(多选扣分).

a.容器中压强不变                   b.混合气体中c(CO)不变

c.υ(H2)=υ(H2O)               d.c(CO2)=c(CO)

(4)若向容器中投入各物质2mol,加热到800℃使反应进行,则此时反应的生成物是______.

考点:达到化学平衡的标志化学平衡常数
题型:问答题

“最是人间留不住,朱颜辞镜花辞树。”这一名句选自( )。

A.柳宗元《渔翁》
B.王国维《蝶恋花》
C.苏轼《腊日游石》
D.范中淹《渔家傲》

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Alexei, Iulia and Leonid are partners in a commandite partnership. Alexei is the investing partner, having contributed capital of 500.000 roubles to the business under the partnership agreement. Iulia and Leonid are general partners. The partnership agreement states that all business will be carried out within the city boundaries of Moscow and that any transaction valued in excess of 750.000 roubles must be sanctioned by both general partners.Iulia has agreed to purchase raw materials from a company in Ekaterinberg in the name of the partnership for 1.000.000 roubles and has signed a contract with the seller to confirm this. On discovering the transaction, Leonid refused to sanction the payment. Iulia immediately resigned from the partnership in protest at Leonid’s action.Required:

(b) In the event that the partnership is dissolved before the matter is resolved, explain the potential personal liabilities of the partners for the transaction that Iulia has carried out. (5 marks)

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就卖方承担的费用而言,下列各项从低到高的排序是( )。

A.FOB、CFR、CIF
B.CIF、CFR、FOB
C.FOB、CIF、CFR
D.CIF、FOB、CFR

题型:问答题

呼吸衰竭

题型:问答题

选用老粉加酚醛清漆调配处理木基层,其质量比为()。

A.100:18

B.100:10

C.25:10

D.100:25

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