Case Study Questions for Class 11 Physics Chapter 11 Thermal Properties of Matter

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Case Study Questions for Class 11 Physics Chapter 11 Thermal Properties of Matter

Case Study Questions:

Table of Contents

Question 1:

Specific Heat Capacity

Heat capacity of a substance is defined as

where ΔQ is the amount of heat supplied to the substance to change its temperature from T to T + ΔT.

Specific heat capacity is the amount of heat per unit mass absorbed or given off to change its temperature by one unit.

It depends on the nature of substance and its temperature.

1. Which one of the following substances has highest specific heat capacity at room temperature and atmospheric pressure?

(a) Water

(b) Ice

(d) Mercury

2. Heat capacity of a substance is infinite. It means

(a) heat is given out.

(b) heat is taken in.

(d) all of these.

3. Water is used as a coolant because

(a) it has lower density.

(b) it has low specific heat.

(d) it is easily available.

4. Calorie is defined as the amount of heat required to raise the temperature of 1 g of water by 1°C and it is defined under which of the following conditions?

(a) From 14.5°C to 15.5°C at 760 mm of Hg

(b) From 98.5°C to 99.5°C at 760 mm of Hg

(d) From 3.5°C to 4.5°C at 76 mm of Hg

5. Find the thermal capacity of 40 g of aluminum. (s = 0.2 cal/g K)

(a) 168 J/°C

(b) 672 J/°C

(d) 33.6 J/°C

Answer

➤ Show Answer

Answer:
1. (a)
2. (c) : Infinite thermal capacity implies that there would be practically no change in temperature whether heat is taken in or given out.
3. (c) : Owing to its high specific heat, water is used as a coolant in automobile radiators as well as a heater in hot water bags.
4. (a) : 1 calorie is the amount of heat required to raise the temperature of 1 g of water from 14.5°C to 15.5°C at 760 mm of Hg.
5. (d)

Case Study Questions for Class 11 Physics Chapter 15 Waves

Case Study Questions for Class 11 Physics Chapter 14 Oscillations

Case Study Questions for Class 11 Physics Chapter 10 Mechanical Properties of Fluids

Case Study Questions for Class 11 Physics Chapter 9 Mechanical Properties of Solids

Case Study Questions for Class 11 Physics Chapter 8 Gravitation

Case Study Questions for Class 11 Physics Chapter 7 System of Particles and Rotational Motion

Case Study Questions for Class 11 Physics Chapter 6 Work Energy and Power

Case Study Questions for Class 11 Physics Chapter 5 Laws of Motion

Case Study Questions for Class 11 Physics Chapter 4 Motion In A Plane

Case Study Questions for Class 11 Physics Chapter 3 Motion in a Straight Line

Case Study Questions for Class 11 Physics Chapter 2 Units and Measurements

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Case Study Questions for Class 11 Physics Chapter 11 Thermal Properties of Matter

Case Study Questions for Class 11 Physics Chapter 11 Thermal Properties of Matter

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Case Study Questions for Class 11 Physics Chapter 11 Thermal Properties of Matter

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