问题 选择题

(10分)(1)已知可逆反应:M(g)+N(g)P(g)+Q(g) ΔH>0,

若要增大Q的浓度,在其它条件不变的情况下可以采取的措施为    (填序号)。

A.加入一定量M     B.降低反应温度     C.升高反应温度    

D.缩小容器体积     E.加入催化剂       F.分离出一定量P

(2)盖斯定律在生产和科学研究中有很重要的意义。有些反应的反应热虽然无法直接测得,但可通过间接的方法测定。现根据下 * * 个热化学反应方程式:

Fe2O3(s)+3CO(g)=2Fe(s)+3CO2(g)       △H=-24.8 kJ·mol-1

3Fe2O3(s)+ CO(g)==2Fe3O4(s)+ CO2(g)   △H=-47.2 kJ·mol-1

Fe3O4(s)+CO(g)==3FeO(s)+CO2(g)      △H=+640.5 kJ·mol-1

写出CO气体还原FeO固体得到Fe 固体和CO2气体的热化学反应方程式:

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(3)在体积为1 L的密闭容器中,充入1 mol CO2和3 mol H2,一定条件下发生反应: CO2(g)+3H2(g)CH3OH(g)+H2O(g)  ΔH=-49.0 kJ/mol, 测

得CO2和CH3OH(g)的浓度随时间变化如右图所示。

①从3 min到10 min,v(H2)=     mol/(L·min)。

②能说明上述反应达到平衡状态的是         (选填编号)。

A.反应中CO2与CH3OH的物质的量浓度之比为1︰1(即图中交叉点)

B.混合气体的密度不随时间的变化而变化

C.单位时间内每消耗3 mol H2,同时生成1 mol H2O

D.CO2的体积分数在混合气体中保持不变

③下列措施中能使n (CH3OH)/n (CO2)增大的是        (选填编号)。

A.升高温度                      B.恒温恒容充入He(g)

C.将H2O(g)从体系中分离          D.恒温恒容再充入1 mol CO2和3 mol H2

答案

(1)A C D F(2分)

(2)CO(g)+FeO(s)= Fe(s) + CO2(g) △H=­-218.00kJ·mol-1(2分)

(3)  ①0.11或 ②D  ③CD (每空2分)

阅读理解

I moved from Chicago to Brooklyn in July of 2010,just in time to watch my mother die. Our parents were both gone now; I took with me as many things they had left behind as I could.

I was out walking one Saturday later that summer when something caught my eye - a pale green dress. Laid out on the pavement was stuff like earrings, glass candle-holders, books. Hanging on the fence behind were a few pairs of jeans and a green cotton dress.

The woman, the host o£ the stoop (门廊)sale, looked like she was getting rid of a past she didn’t need or want. A dress that was too big for her. A chest of drawers that took up too much space, space she needed, maybe, to heal ,recover, or grow.

I wasn’t planning on buying anything really, but now I needed to show her that I appreciated her things and I would give them a safe home. Then I had my first stoop sale —I paid her 20 dollars for her green cotton dress and her blue candle-holder,

From that day on, I became interested in stoop sales. Some of my favorite things are from someone else’s life. I find no joy in shopping at regular stores any more. I love trying to sniff out a memory from a bud vase or a drawer. It is comforting to know that someone has breathed and laughed inside a sweater before me.

A few weeks ago, I carried my mother’s dresses to a friend’s stoop. These were her best items ,which were once worn by the most important person in my life. For many hours, I watched from across the path people advancing the stoop, some leaving with Mom1S dress. I used to think that her stuff was as forever sacred (神圣的)as my memory of her, I know now that once I love a scarf or shirt too dearly,it needs to find a new home. Even that green dress is long gone by now.

小题1:The author took her mother*s dresses after her death because ______

A.she valued the things used by her mom

B.she didn’t want to throw them, away

C. she could sell them later

D. they were her mom’s best items小题2:From the passage, we know that ______.

A. the things the author bought from the woman are too big

B. the author is fond of imagining others’ life experiences

C. the author will never shop at regular stores any more

D. the author still keeps most of her mom’s things小题3:In the last paragraph ,the author tries to tell us that ______.

A her mom is the number one person in her life

B.  she didn’t really want to sell her mom’s dresses

C. she still thinks of her mother quite often

D. love doesn’t mean holding on to something tightly

小题4:It can be inferred that the author will ______.

A. not sell her own things at stoop sales

B.keep her mom in her mind in another way

C. be sad about all the memory of her mom

D. move to another city for a new life

多项选择题