红磷P(s)和Cl2发生反应生成PCl3和PCl5,反应过程和能量关系如图所示(

题型:问答题

问题:

红磷P(s)和Cl2发生反应生成PCl3和PCl5,反应过程和能量关系如图所示(图中的△H表示生成1mol产物的数据)

据图回答下列问题

(1)P和Cl2反应生成PCl3的热化学方程式______;

(2)PCl5分解生成PCl3和Cl2的热化学方程式______;

上述分解反是一个可逆反应,温度T1时,在密闭容器中加入0.8mol PCl5,反应达到平衡时还剩余0.6mol PCl5,其分解率α1等于______;若反应温度由T1升高到T2,平衡时PCl5分解率α2,α2______α1(填“大于”,“小于”或“等于”);

(3)工业上制备PCl5通常分两步进行,先将P和Cl2反应生成中间产物PCl3,然后降温,再和Cl2反应生成PCl5.原因是______;

(4)P和Cl2分两步反应生成1mol PCl5的△H3=______;P和Cl2一步反应生成1mol PCl5的△H4______△H3(填“大于”、“小于”或“等于”),原因是______.

考点:能量的相互转化
题型:问答题

一物体沿直线运动,下列 x-t、v-t图象中表示物体做匀变速直线运动的是(  )

A.

B.

C.

D.

题型:问答题

卵巢囊肿的CT征象不包括()

A.水样密度肿块

B.圆形或椭圆形

C.边缘光滑

D.增强扫描无强化

E.常有分隔

题型:问答题

Money and Happiness

A Guide to Living the good life

Author: Laura Rowley

Publisher: Wiley (March 1, 2005)

Laura Rowley makes us all understand the money-happiness connection in our own lives so that we spend our time and our efforts wisely. She offers insight that every reader can use to make smarter decisions that will lead to living a rich life in every possible definition of the term.

The Happiness Makeover

How to Teach Yourself to Be Happy and Enjoy Every Day

Author: M. J. Ryan

Publisher: Broadway (May 10, 2005)

Ryan’s own desire to be happier first led(引领) her to study what is known about happiness from brain science, psychology, and the wisdom traditions of the world. The Happiness Makeover draws on this wide-ranging knowledge and presents a plan that will help you:

Clear away happiness hindrances(障碍物) like worry, fear, envy, and grudges

Discover happiness boosters like meaningful work, challenge, and gratitude

Learn to think optimistically(乐观地)(it is really possible!)

Find daily ways to truly enjoy, even relish, the moments of your life Happiness

The Science Behind Your Smile

Author: Daniel Nettle

Publisher: Oxford University Press (July 1, 2005)

This is the first book to look thoroughly at what happiness is and how it works. Nettle examines whether people are basically happy or unhappy, whether success can make us happy, why some people are happier than others, and much more.

Hormones(荷尔蒙), health, and Happiness

Author: Steven F. Hotze

Publisher: Forrest Publishing (April, 2005)

Dr Steven Hotze is leading a wellness revolution that advances a new model of health care. In Hormones, Health, and Happiness you are shown how to reach and maintain optional cell, tissue(身体组织), and organ(器官) functioning so that you can enjoy a better quality of life.

小题1:At least how many books are written by women according to the passage above?

A.4

B.3

C.2

D.1小题2:Whose model will possibly help readers obtain health naturally(自然地)?

A.Laura Rowley

B.Ryan’s

C.Daniel Nettle’s

D.Steven F. Hotze’s小题3:Which book is the result of the author’s own need to know more about happiness?

A.Hormones, health, and Happiness

B.Money and Happines

C.The Happiness Makeover

D.The Science Behind Your Smile

题型:问答题

从1950年代开始,()引入了一种折中式的浪漫古典主义的做法,这使他被人称为后现代主义的精神之父。

A菲利普·约翰逊

B路易斯·康

C罗伯特·文丘里

D查尔斯·詹克斯

题型:问答题

钢坯横断面中心到边部化学成分的差异指()。

A.误差

B.偏析

C.断面偏差

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