NCERT Solutions for Class 11 Physics Chapter 12 Thermodynamics


NCERT Solutions for Class 11 Physics Chapter 12 Thermodynamics: In this chapter, we will study how heat is converted to work and vice versa. For example, electrical energy can be utilized to boil water and similarly, steam can be utilized to produce electricity. The NCERT Solutions for Class 11 Physics Chapter 12 Thermodynamics starts with the definition of thermodynamics.

What is Thermodynamics?

Thermodynamics is the branch of physics which deals with the study of heat and temperature and the inter-conversion of heat and other forms of energy. To understand this definition we will compare Thermodynamics with mechanics. 

  • In mechanics, we study the motion of bodies under the action of forces or torque.
  • But thermodynamics does not deal with the motion of the system as a whole. It is concerned with the internal macroscopic state of the body.
  • Let's take an example mentioned in NCERT Solutions for Class 11 Physics Chapter 12 Thermodynamics, When a bullet is fired from a gun, the mechanical state of the bullet, that is the kinetic energy changes, but not its temperature. When the bullet passes through wood and stops, the kinetic energy of the bullet is converted into heat, changing the temperature of the bullet and the nearby layers of wood. 
  • That is the temperature of a body is related to its average internal energy, not to the kinetic energy of its motion.

The main topics of NCERT Class 11 Physics Chapter 12 Thermodynamics are listed below:

12.1 Introduction

12.2 Thermal equilibrium

12.3 Zeroth law of Thermodynamics

12.4 Heat, internal energy and work

12.5 First law of thermodynamics

12.6 Specific heat capacity

12.7 Thermodynamic state variables and equation of state

12.8 Thermodynamic processes

12.9 Heat engines

12.10 Refrigerators and heat pumps

12.11 Second law of thermodynamics

12.12 Reversible and irreversible processes

12.13 Carnot engine

The NCERT exercise of the chapter thermodynamics contains 10 different questions. Try to solve all these questions yourself which will help you to boost your concepts.

If you find difficulties in solving below are the NCERT Solutions for Class 11 Physics Chapter 12 Thermodynamics:

Q-12.1 A geyser heats water flowing at the rate of 3.0 liters per minute from 27 °C to 77 °C. If the geyser operates on a gas burner, what is the rate of consumption of the fuel if its heat of combustion is 4.0 x 10^4 J/g?

NCERT Solutions for Class 11 Physics Chapter 12 Thermodynamics - Exercise Solutions

NCERT Solutions for class 11 Physics


Physical world


Units and Measurement


Motion in a straight line


Motion in a Plane


Laws of Motion


Work, Energy and Power


System of Particles and Rotational motion




Mechanical Properties of Solids


Mechanical Properties of Fluids


Thermal Properties of Matter


Kinetic Theory






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