1987-10-29 — Page 20

育教聞港

頁四第張五第日七初月九年卯丁曆夏 煕 超班賢起 兆陈伍伍長事致中人國殻、獎,劃」,方數七致行

、昌 梭大旋甲長答學, B

、、德操車庭陳司岗中之本席望式署:

WAH KIU YAT PO

報日僑華

四期星

盧馬 堈值甘,而

何主 初、 陳老

岸

三罐车

在理整

獲時

金獎金 獲監、始理申創

薇八餸

芭港

炭、區查綿、陳

街道傳黃

凡葉暢明·沃材黃金套

陳梁林伍

亮藏鸿永林林、

明南志灼龄國伍伍余、

......永籌國超愷則、劉八共理梁

黄李鄺朱 、、神碟變監副湘人十事 鹽炳氷正黃黃、、、等理雲、

1988中學會考 試題預習專欄

『生會定·九乃意粉

互年本的之

,獲金黃

·獎已 福時

香港台山商會頒發

邑人子弟獎助學金

Celsius goale

-100°c

X

物理(五)

Lover fixed point Upper fixed point

The relation.

between a temperature TK on the absolute temperature scale and the same temperature

X100吋

MILL & DALE PRESS }

Revision Exercises

for

Cert. Exam, (1988)

【PHYSICS (5)

Chapter 2: Heat 2.1. Temperature and

-temperature scal

The temperature. an object is a measure of the hotness or coldness of an object, It is measured by a number which expresSER its degree of hotness on, some chosen scale, According to kinetic; "theory, the

temperature of a

substance is determined by the average' kinetic. energy of each particle

in the substance.

temperature scale defined by the

procedure:

Choose a substance which baw-mea=u=:

property

Whose magní tude :chen

continuously with

the substancetus

two easil

ible fixed

sign:

Poni:

She value

ometric

ineari

e°c on the Celsius #cale in

T=273+0

THERMOMETERS

Athermometer is an instrument which measures temperature. The measure-

ment of temperature. involves the measurement of the thermometric properties of the thermometric substance used in the thermometer. A thermometer should have Tow thermal capacity: compared. with the body being measured so as not to change appreciably the temperature of the body.

There are several kinds of thermometers, classified according to measurement of different thermometric properties.

。

Xo

Kelvin Seale

图:新會連同鄉會麼異會慶第十四屆理

(or Absolute température scale).

T

100

X100 value of physical quantity at 100°C

0

口

wvalue of physical

quantity at 0°C

wtemperature to he

ature to l

determined (in C)

svalue of physical quantity at "c

By equating the slope of the straight line

Kinds of thermometers

275k 373k

0-110

is the temporar ture of the oil bath in

°c)

筒監

日九廿月十年七八九一曆公年六十七國民華中

與親會在榮、端作助更 除∵得致事特理倫 中畫 榮發取 外務本休陳類,學優異獎 頒監、、、麥法會

·繼障各促,乘築理筒及苷發季何小本會 暖潮

交陳照及度陳:弟間

盧寶會同學所開老果界式

陳佳

、

羊

*陳系泉:

邦沾、萬

陳天

文。副理事長:陳國、盧志立。總務主任

鈷照、區永業、阿勝,陳英才。理事長:甘

【體樸 基述 場 防劃,令會面送友

待送請指式,人 紀會出柜在問 滋椒呼:

:食堂:

會再

食

潮連鄉會會慶獎學

第十四屆就職典禮

中本港新聞

事女慶發

陳學

潘水、貞:夜耀圻、雷任甘何玄驳服藏

the temperature of, the oil is 110°C.

(b) Let the length of the mercury column be

x-20

-10-0 70-20-100-0

X-15 (mm)

(Ans.}

化學(五)

明連出版社

KILL & DALE PRESS

Revision Exercises

for

Cert Exam. (1988)

CHEMISTRY (5)

hermomet

Thus,

100-0100 Example: A:mercury-in-

Thermometric properties

Volume of lquid

Pressure pí ga's

Volume-off gas.

Electrical resistance

'Liquid

Liquid-in-glass thermometer Constant volume gas thermometer Constant pressure gas thermometer Realatance thermometer

Thermopile

The physical propertie

of a thermometrica

nce, such as the

Tof a gas at.

∙liqui?

the

of a vire the

suring

therandomfofa couplesete change temperature. By mes the changes in the physical properties of a body, temperature can be determined,

the:

bette

EM.P. of thermocouples

glass thermometer

is first placed

pure melting:

Resistance. vire:

Metal wires

Question 7

ice, the

boilin

water at

The set-up appar is

-below

Bl

labor

Length

20mm

1 at and-finally In an oil bath.

in pure melting ice in boiling water

in oil bath

(0) What is the

temperature of the

oil bath?

『bb Tr the thermometer

The

denoted

against the

rature nevill

tures

he figure

point

be

nd the

are

of passing the

gaseous reactants

through cone. Hg80?

(d) What does solid

gulphur trioxide: look like?.

(e) Why is a drying bulb containing anhydrous calcium chloride attached to the receiver?

(f) Only initial heating.

of the catalyat is, needed and once the reaction has started, no more heating is required. What does. this tell you about" the nature of the reaction?.

(g) Why does the catalyst

needed to be heated at all?

(h) What volume of

sulphur dioxide, mensured at s.t.p.. would be reacted in obtaining 3.2 g of

sulphur trioxide?

(1) In contact process,

sulphur trioxide

obtained is first" dissolved in

concentrated sulphuric acid but not directly. in water, why is thia step taken?

(J) Describe what would you observe, giving equations where appropriate, in each of the following simple experimenta. i) A mixture of

godina ohloride manganese(IV)

concentrated Bulphuric acid) is bested.

A mixture

potass

copper

and concentrated sulphuric adid is heated: Question 8

(a) What would you

obser

heating:

gently some iron(11)

- sulphate crystals (F@S0; 7H,0) in a

dry test-tube?:

(b) The residue obtained

in (a) is then heated strongly and the gaseous products. fòrmed are dissolved! tasome

anbydrous, (calcium'

chloride

vate

catalyst.

tube

rature

hent

the mercury

(11)

sölut

istilled

boiling

ive a

Name the substance(s).

solution X. Name the compound() which might be. -present in the precipitate and give-the-ionic equation(s) for its/their formation. iv)'What would you

observe, if an excess of dilute hydrochloric acid is added to the precipitate and' the mixture ia gently heated? Explain briefly, giving the equation(a).

What left behind in the test-tube after strong heating is a brown solid T. (1)What is the

reddish-brown solid Y?

(2)Give an equation.

for its formation. (3)What|maau of

iron(II) sulphate crystals is required to give 3.2 g of the aolid Yonatrong. heating?

(4)A yellowtab-brown

solution" Zià. obtained on heating-gently. solid Y with dilute sulphuric acid. What is the solution Z and what i responsible for its yellowish- brown colourp

Name two simple compounds composing" of sodium, sulphur and oxygen atoms.

ii) Give the respective

oxidation numbers of sulphur in the two compounds mentioned in:(i).

iii) on reacting with

squeous bromine solutions one of the tva compounds mentioned in (1) in convexted to the other

(1)With reference

the changes. the oxidation numbers,atate. whether sulphur 1日 0xd1ed or reduced in the above reaction. (2)Give an equation of the reaction.

(d) What would happen

the and the their

nitates

conc.

sulphate

crystal is partly immerged fa some

СОДС

Question 9.

(a) 2.64g of

-test-tube

a large copper(11) sulphate crystal

molid

mixture of ammonium aulphate and. potassium sulphate is weighed.out into a flask containing

50~0.5.14

potassium hydroxide solution and the mixture is then. boiled so as to

expel all the ammonia gas, The resulting solution is

completely neutratized by 12.5 cm of a solution containing 19.6g of anlphuric acid per cubic decimetre. Write the equations

of the reactions favolved.

ii) Calculate the

composition by mesa of the original. mixture.

(b) Four elements H, X, Yand Z have the jelectronic

structures

(G) 1, G4, [G) 6

and G-7 respectively, where [G] represents the electronic Configuration of an. inert gas.. Using W, X, Y and Z as the chemical: aymbols, give. the

formula of

1)e:compound"P

formed-by.H

Z par

(2)acompound Q

formed by:W. and Yog (3)a compound R --- formed by X

romnd S

formed. by X and Z

ii) State, the type nf

bond preser

che.cdap:

and

pective.

iii)Using the outermost

shells only, draw diagrams to show the electronic-

the ind. S

consists

atonic

Hea under

ΠΟΥ

(1.)W

sulphuric acid

ow for

(2)Draw:

xplain

ould its

旅遊介紹 專欄廣告

博覽旅遊國·清邁·布吉島 泰星馬·星馬·泰星

限公

八天白

成本最 十天由 $4600起!

$3980 怡保、邦喀島)七天 $3980

本州五天。

台灣專線

九州本廸士尼聯遊新

士尼变美

秀 溪頭

台東 五佛光山 (因

方便讀者 選擇旅遊

日本·韓國 台灣

菲律賓

碧瑤、百島、大富郡、宿霧、碧桃灣 高級四天、五天、六天七天 由1890起 由2490起

港 宿霧五天、六天

“核城·丹〇八天

每道廸士尼七天

路六、七、九天由$

迪士尼八天

台北四天 台北花蓮 台北阿

$2200

$2300

$2490

增加成本,多培 赫海、大富郡、百島嶼(妙美泰國

$2300 高雄网

杏灘酒店

新加坡四 五天 馬來西

溫陽四天·五

•煙晨

旅遊有限公司

堤雅五十

六天直航豪華團 190 天天出發

天津八天直航

天豪華航空

桂林、陽朔、靈渠 (90)

逢星期二、三、六日

| 五天直航團天天出發

$1590

南邦四天

務部:

共 杭州八天航空團 逢星期三、日出發

邱州贝天直航

全江南七天直航團 逢星期二、五出發

$ $2690

南島五天直航團

期一、三、五出發$1650

口問八天直航團

$338*

Page 20Page 21