Class 9th Physics Unit 8 Thermal Properties of Matter

physics 9th notes Chapter No 8

1. Quantity of heat that changes one kilogram of a of solid into liquid is called:

 
 
 
 

2. The specific heat of Lead is:

 
 
 
 

3. Heat is a type of:

 
 
 
 

4. The temperature of the boiling water is:

 
 
 
 

5. The specific heat of Granite is:

 
 
 
 

6. The liquid (s) used in thermometers is (are):

 
 
 
 

7. The specific heat of Glass is:

 
 
 
 

8. Thermostat is used in:

 
 
 
 

9. The device used to measure of the specific heat of an object is:

 
 
 
 

10. The temperature of liquid oxygen is:

 
 
 
 

11. The specific heat of Soil (dry) is:

 
 
 
 

12. The temperature in the Sun’s surface is:

 
 
 
 

13. The specific heat of Silver is:

 
 
 
 

14. Unit of specific heat is:

 
 
 
 

15. The specific heat of Sand is:

 
 
 
 

16. The temperature of the freezing water is:

 
 
 
 

17. The specific heat of Steam is:

 
 
 
 

18. Cause of land and sea breeze is:

 
 
 
 

19. Which of the following has highest specific heat?

 
 
 
 

20. The specific heat of Bricks is:

 
 
 
 

21. The specific heat of Mercury is:

 
 
 
 

22. Which of the following substances have greater average kinetic energy of its molecules at 10ᵒC?

 
 
 
 

23. The characteristic of unequal expansion of different metals is employed in a device known as:

 
 
 
 

24. Celsius equivalent of 0K is

 
 
 
 

25. Which flower is a natural thermometer?

 
 
 
 

26. 4200 Jkg⁻¹K⁻¹ is the specific heat capacity of:

 
 
 
 

27. Temperature is the:

 
 
 
 

28. The quantity of heat that causes 1K change in temperature in a substance of mass 1 Kg is called

 
 
 
 

29. The specific heat of Clay is:

 
 
 
 

30. The specific heat of alcohol is:

 
 
 
 

31. The specific heat of Copper is:

 
 
 
 

32. ß =

 
 
 
 

33. Temperature of 30 ᵒC in Fahrenheit is

 
 
 
 

34. The specific heat of Aluminum is:

 
 
 
 

35. The SI unit of temperature is:

 
 
 
 

36. Ice is a (an):

 
 
 
 

37. The temperature in the Sun’s core is:

 
 
 
 

38. Boiling point of water in Fahrenheit is

 
 
 
 

39. 385.0 Jkg⁻¹K⁻¹ is the specific heat capacity of:

 
 
 
 

40. The temperature of the electric lamp is:

 
 
 
 

41. The specific heat of Iron is:

 
 
 
 

42. The kinetic energy of molecules of an object depends on

 
 
 
 

43. Thermostat works on the principle of:

 
 
 
 

44. Liquid expansion is if

 
 
 
 

45. The specific heat of Tungsten is:

 
 
 
 

46. Volume expansion depends on:

 
 
 
 

47. The specific heat of Ice is:

 
 
 
 

48. Fahrenheit equivalent of 0K is:

 
 
 
 

49. The specific heat of Carbon is:

 
 
 
 

50. The specific heat of Ether is:

 
 
 
 

51. The specific heat of Gold is:

 
 
 
 

52. Linear expansion depends on:

 
 
 
 

53. Specific heat of water is: 

 
 
 
 

54. The temperature of normal human body is

 
 
 
 

55. The temperature of ice in freezer is

 
 
 
 

56. The temperature of the gas lamp is:

 
 
 
 

57. Human normal body temperature of 37 ᵒC in Fahrenheit is

 
 
 
 

58. The specific heat of Turpentine is:

 
 
 
 

Short Questions

Define and explain the latent heat of fusion.
Define coefficient of linear thermal expansion. Write its formula and unit.
Define heat capacity. Write its formula and unit.
Define heat. Write its unit.
Define latent heat of vaporization.
Define linear thermal expansion. On which factors does it depend?
Define temperature and write its unit.
Define the fusion point and freezing point?
Define the latent heat of vaporization.
Define the terms heat and temperature.
Define the terms of thermal conduct and thermal equilibrium.
Define thermal expansion.
Define Volume thermal expansion. On which factors does it depend?
Derive the relation for volume thermal expansion in solids.
Describe the feature of mercury-in-glass thermometer
Differentiate between temperature and heat?
Differentiate between the real and apparent expansion of liquid?
Every thermometer makes use of some property of a material that varies with temperature. Name the property used in:
Explain that the bimetallic strip used in the thermostat is based on the different rate of expansion of different metals on heating.
Explain the thermal expansion of liquids
Explain the volumetric thermal expansion.
Give coefficient of linear thermal expansion of some common solids.
Give the values of β for different substances?
Give two uses of cooling effect by evaporation.
Highlight the different scale of temperature from one scale to another (Fahrenheit, Celsius and Kelvin scales)
How can you convert the temperature from one scale to another (Fahrenheit, Celsius and Kelvin Scales?)
How does heating affect the motion of molecules of a gas?
How evaporation differs from vaporization?
How specific heat differs from heat capacity?
List the application of thermal expansion?
Show that   V =  (1+ β Δ T)?
What do you mean by lower and upper fixed points in a thermometer?
What is a thermometer? Why mercury is preferred as a thermometric substance?
What is meant by the internal energy of a body?
Why does heat flow from hot body to cold body?
Why gaps are left in railway tracks?
Why gaps are left in the bridge with rollers?
Why overhead transmission lines (wires on electric poles) are also given a certain amount of sag?
Why the coefficient of volume expansion of liquids is greater than solids?

Long Questions

 

A balloon contains 1.2 air at 15°C. Find its volume at 40°C. Thermal coefficient of volume expansion of air is 3.67 .
An electric heater supplies heat at the rate of 1000J per second. How much time is required to raise the temperature of 200 g of water from 20°C to 90°C?
Calculate the increase in the length of an aluminium bar 2 m long when heated from 0°C to 20°C, if the thermal coefficient of linear expansion of aluminium is 2.5.
Define and explain the latent heat of fusion.
Define evaporation. On what factor speed of evaporation depend? Explain.
Define heat capacity. Derive its mathematical formula and write down an activity to
Define latent heat of fusion and write down its mathematical formula.
Define specific heat. How would you find the specific heat of a solid?
Define the latent heat of vaporization of water with the help of the experiment.
Derive the relation for linear thermal expansion in solids.
Describe an activity to determine the change of state of ice into water and steam by sketching graph.
Explain the importance of large specific heat capacity of water.
Explain the volumetric thermal expansion.
Find the latent heat of fusion of ice with the help of the experiment.
Find the temperature of the water after passing 5 g of steam at 100°C through 500 g of water at 10°C. 
(Note: Specific heat of water is 4200 Jkg⁻¹ K⁻¹, Latent heat of vaporization of water is 2.26×10⁶ )
How much heat is required to change 100g of water at 100°C into steam? (Latent heat of vaporization of water is 2.26 .
How much heat is required to increase the temperature of 0.5 kg of water from 10°C to 65°C?
How much ice will melt by 5000 J of heat? Latent heat of fusion of ice = 336000 J .  
Normal human body temperature is 98.6°F, convert it into Celsius scale and kelvin scale.
Show that Lo =  (1+ α Δ T)?
Temperature of water in a beaker is 50°C, what is its value in Fahrenheit scale?
What is linear Expansion? On what factor it depend? Derive its mathematical
What is meant by evaporation? On what factors the evaporation of liquid depends? Explain how cooling is produced by evaporation.
What is specific heat? Explain with examples and derive its mathematical formula.
What is thermal expansion? Explain on the basis of kinetic molecular theory.
What is thermometer? Explain its different types.
What is volume expansion? On what factors it depend? Derive its mathematical
Write down the applications of thermal expansion.
Write down the consequences of thermal expansion.

Leave a Reply

Your email address will not be published. Required fields are marked *