Chapter-08: Thermal Properties of Matter

After studying this unit, the students will be able to:

• Define temperature (as quantity which determines the direction of flow of thermal energy).
• Define heat (as the energy transferred resulting from the temperature difference between two objects).
• List basic thermometric properties for a material to construct a thermometer.
• Convert the temperature from one scale to another
• Describe rise in temperature of a body in terms of an increase in its internal energy.
• Define the terms heat capacity and specific heat capacity.
• Describe heat of fusion and heat of vaporization.
• Describe experiments to determine heat of fusion and heat of vaporization of ice and water respectively by sketching temperature-time graph on heating ice.
• Explain the process of evaporation and the difference between boiling and evaporation.
• Explain that evaporation causes cooling.
• List the factors which influence surface evaporation.
• Describe qualitatively the thermal expansion of solids.
• Explain thermal expansion of liquids.
• Solve numerical problems based on the mathematical relations learnt in this unit.

Multiple Choice Questions

1.	All the bodies expand _______ on heating:
	a. Variable	b. Constantly
	c. Uniformly	d. All of them
2.	Temperature is the:
	a. Mass contained by the body	b. Force of the molecules of body
	c. Degree of hotness or coldness of the body	d. None of above
3.	The SI unit of temperature is:
	a. °C	b. °F
	c. K	d. °K
4.	Temperature of 30 °C in Fahrenheit is:
	a. 86 °F	b. 80 °F
	c. 30 °F	d. 90 °F
5.	Human normal body temperature of 37 °C in Fahrenheit is:
	a. 98.6 °F	b. 98 °F
	c. 100 °F	d. None of above
6.	Boiling point of water in Fahrenheit is:
	a. 100 °F	b. 273 °F
	c. 212 °F	d. 373 °F
7.	Celsius equivalent of 0K is:
	a. -273 °C	b. -459.4 °C
	c. 0 °C	d. 100 °C
8.	Fahrenheit equivalent of 0K is:
	a. -273 °F	b. -459.4 °F
	c. 0 °F	d. 100 °F
9.	Heat is a type of _____ energy:
	a. Kinetic	b. Potential
	c. Mechanical	d. None of above
10.	Linear expansion of a rod occurs along
	a. One	b. Two
	c. Three	d. All
11.	The characteristic of unequal expansion of different metals is employed in a device known as:
	a. Thermometer	b. Burner
	c. Calorimeter	d. Thermostat
12.	Linear expansion depends on:
	a. Length of rod	b. Change in temperature
	c. Nature of material of rod	d. All of above
13.	Thermostat works on the principle of:
	a. Unequal expansion of solids	b. Pascal’s law
	c. Anomalous expansion of water	d. Vaporization
14.	Thermostat is used in:
	a. Electric iron	b. Refrigerator
	c. Fire alarm	d. All of above
15.	SI unit of Coefficient of linear & volume expansion is:
	a. m	b. K
	c. K-1	d. °C
16.	Volume expansion depends on:
	a. Volume of block	b. Change in temperature
	c. Nature of material of block	d. All of above
17.	Beta () =
	a. a	b. 2a
	c. 3a	d. 5a
18.	There are _______ type (s) of expansion (s) take place in a liquid filled in a container:
	a. One	b. Two
	c. Three	d. Four
19.	The liquid(s) used in thermometers is (are):
	a. Mercury	b. Alcohol
	c. Water	d. Both a & b
20.	Ice is a (an):
	a. Good conductor	b. Bad conductor
	c. Perfect Conductor	d. None
21.	The quantity of heat that causes IK change in temperature in a substance of mass 1 Kg is called:
	a. Specific heat	b. Latent heat
	c. Heat of exchange	d. None of above
22.	Unit of specific heat is:
	a. Jkg-1K	b. JkgK-1
	c. Jkg-1K-1	d. J
23.	Which of the following has highest specific heat?
	a. Water	b. Ice
	c. Mercury	d. Alcohol
24.	Specific heat of water is:
	a. 2100 Jkg-1K-1	b. 2500 Jkg-1K-1
	c. 3200 Jkg-1K-1	d. 4200 Jkg-1K-1
25.	Climate of regions near sea shore remains moderate due to:
	a. Greater specific heat of water	b. Less specific heat of water
	c. Low freezing point of water	d. High boiling point of water
26.	Cause of land and sea breeze is:
	a. Greater specific heat of water	b. Less specific heat of water
	c. Low freezing point of water	d. High boiling point of water
27.	The device used to measure of the specific heat of an object is:
	a. Thermometer	b. Burner
	c. Calorimeter	d. Thermostat
28.	Quantity of heat that changes one kilogram of a of solid into liquid is called:
	a. Specific heat	b. Latent heat of fusion
	c. Latent heat of vaporization	d. All of above
29.	Quantity of heat that changes one kilogram of a of liquid into gas is called:
	a. Specific heat	b. Latent heat of fusion
	c. Latent heat of vaporization	d. All of above
30.	Unit of latent heat is:
	a. Jkg-1K	b. Jkg
	c. J	d. Jkg-1
31.	Latent heat of fusion of ice is:
	a. 2,260,000 Jkg-1	b. 336,000 Jkg-1
	c. 3,260,000 Jkg-1	d. None of above
32.	Latent heat of vaporization of water is:
	a. 2,260,000 Jkg-1	b. 336,000 Jkg-1
	c. 3,260,000 Jkg-1	d. None of above

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