question chapter 4_002

8/8/2019 Question Chapter 4_002

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JPN Pahang Physics Module

Chapter 4 : Heat

Easy Success

1

SECTION A; MULTIPLE CHOICE

1. Diagram 1 shows two object are in thermal equilibrium placed in a container filled with water for

long period of time.

DIAGRAM 1

Which of the following statements is true?

A Temperature of the stone is same with the temperature of copper foil

B Temperature of the water is same with the temperature of the stone and copper foil.

C Temperature of the copper foil is same with temperature of water .

2 Diagram 2 shows four metals block of same mass with their respective specific heat capacity.

Same amount of heat is given to each block

Which of the blocks will show the highest temperature.

A P

B Q

C R

D S

130 J kg-1

C-1

P Q R S

450 J kg-1

C-1

500 J kg-1C

-1900 J kg-1 C-1

Water

Stone

Copper

foil

DIAGRAM 2

CHAPTER 4: HEAT




Chapter 4 : Heat

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3 The following factor causes the pressure of a gas in a cylinder to increase.

A The volume of the cylinder decrease.

B. The average speed increases.

C The average distance between the gas molecules decrease.

D The rate of collision between the gas molecules and the walls increases.

4 The graph below shows the relationship between pressure of a gas with temperature

Which of the following relationship is true.

A P α T

B P α 1/T

C P increases linearly to T

5 Diagram 3 shows a cooling graph of a substance.

What is the state of the substance in the region BC

P/Pa

T/ o

-273oC 0

Temperature/ O

C

Time/min

A

B C

D

DIAGRAM 3




Chapter 4 : Heat

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A Solid

B Liquid and solid

C LiquidD Liquid and gas

6 If there is no net flow of heat energy between two objects that are in thermal contact, then

the two objects must have the same …………….

A mass

B temperature

C specific heat capacity

D specific latent heat of fusion

7 Diagram 4 is a graph which shows how the temperature of a substance changes with time.

DIAGRAM 4

What is the melting point of the substance?

A j

B k

C l

D m

8 Diagram 5 shows an experiment to determine the specific heat capacity of water.

Time

Temperature

j

k

l

m

Stirrer

WaterFelt cloth

Thermometer

Beaker

Immersion

heater

Power

supply

+

-

Diagram 5




Chapter 4 : Heat

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What is the function of the felt cloth?

A. To reduce the amount of heat lost to the surrounding

B. To avoid the beaker from overheating.

C. To keep the water temperature remain constant

D. To be able to carry the beaker easily.

9 Diagram 9 shows a glass tube filled with lead shot float vertically in water.

Which of the following statements is correct?

A Weight of glass tube and lead shot = Weight of the water displaced

B Volume of the glass tube = Volume of the water displacedC Density of a glass tube = Density of water

D Density of lead shot = Density of glass tube

10. Diagram 10 shows a process in which water is changed to steam.

The heat absorbed during the process is called

A specific heat capacity

B latent heat of fusion

Glass tube

Lead shot

Water

Diagram 9

Water Steam

Dia ram 10




Chapter 4 : Heat

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C latent heat of vaporisation

D latent heat of condensation

11. Diagram 14 shows the condition of the air bubbles releases by a diver.

The above situation can be explained by

A Pressure law

B Boyle’s law

C Charles’s law

12. Diagram below shows a thermometer.

Which modification will increase the sensitivity of the thermometer ?

A Using a longer capillary tube

B Using a bulb with a thicker wall.

C Using a glass stem with a thicker wall

D Using a narrow bore of capillary tube.

13. Gas pressure in container is due to

A momentum of the gas particles

B change in the momentum of the gas particles

Diagram 14




Chapter 4 : Heat

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C rate of change in the momentum of the gas particles.

D rate of change in the momentum of the gas particles per unit area.

14. The heat absorbed,Q is plotted against the change in temperature, Δ θ for four different

objects, A, B, C and D. Which object has the highest specific heat capacity ?

15. The table shows three solids and their respective spesific heat capacity.

Solid Spesific heat capacity/Jkg-1

ºC-1

R 428

S 850

T 3500

By assuming all three solids have high melting points, which is suitable for making the

base of a frying pan and which is suitable for making the handle of the frying pan?

16. Diagram shows pressure in a tyre before a car starts it’s journey

Base of frying pan Handle of frying pan

A R TB T R

C S T

D T S

210 kN m-2




Chapter 4 : Heat

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7

The pressure in the tyre increased to 212.0 kN m-2

after a long journey.

This is caused by

A the density of air inside the tyre which has decreased

B the mass of air inside the tyre which has increased

C the temperature inside the tyre which has increased

17. A thermometer is inserted into a hole in an aluminium block which has a little oil in it.

Oil is used

A. to transfer heat by convection

B. to insert the thermometer easily

C. to reduce lost of heat to the surroundingD. to increase the conductivity of heat

18. Which of the following is a constant variable in a Boyle’s Law experiment?

A Temperature

B Volume

C Pressure




Chapter 4 : Heat

Easy Success

8

SECTION B: STRUCTURED QUESTIONS

1. A substance X with mass 0.5 kg is heated by using a heater 100 W. Diagram shows graph

temperature against mass for the substance.

(a). What is the time taken by substance X to achieve melting point ?

………………………………………………………………………………

[1 mark ]

(b). Based on information on graph, find specific latent heat for the substance X.

[2 marks]

(c). By using kinetic theory, explain why there is no increase in temperature at QR.

........................................................................................................................

........................................................................................................................

[2 marks]

Temperature (oC )

Time (s)




Chapter 4 : Heat

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2. Diagram 2.1 and Diagram 2.2 show an experiment is carried out to investigate a law of gas.

A column of air is trapped in the capillary tube and is heated for a period of time.

Diagram 2.1 Diagram 2.2

(a) What is meant by heat?

...............................................................................................................................

[1 mark]

(b) (i) Compare the length of the air trapped in the capillary tube in Diagram 2.1 and Diagram 2.2.

………………………………………………………………………………………

[1 mark]

(ii) Compare the temperature of the air trapped in the capillary tube in Diagram 6.1 and Diagram 6.2.

………………………………………………………………………………………

[1 mark]

(iii) Name the physical quantity represented by the length of the air trapped.

………………………………………………………………………………………

[1 mark]




Chapter 4 : Heat

Easy Success

10



Marking scheme chapter 4 paper1

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SECTION B: STRUCTURED

1 B

2 D

3 D

4 C

5 B

6 B

7 C

8 A

9 A

10 C

11 A

12 D13 D

14 A

15 A

16 C

17 A

18 A

1(a) 300 s 1

(b) Pt = ml

100 x ( 1050 – 300) = 0.5 l

l = 150 000 J kg-1 (with unit)

1

1

1

(c) Heat supplied is used to break up bonds between molecules 1

TOTAL 5

2(a) Heat is a form of energy 1

(b)(i) Diagram 6.2 is higher // vice versa 1

(ii) The temperature in Diagram 6.2 is higher // vice versa 1

(iii) Volume 1

TOTAL 5

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Marking scheme chapter 4 paper1

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1(a) 300 s 1(b) Pt = ml

100 x ( 1050 – 300) = 0.5 l


1

1

1


TOTAL 5

1(a) 300 s 1

(b) Pt = ml

100 x ( 1050 – 300) = 0.5 l


1

1

1


TOTAL 51(a) 300 s 1

(b) Pt = ml

100 x ( 1050 – 300) = 0.5 l


1

1

1


TOTAL 5



question chapter 4_002

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