Thermal Properties of Matter is an important chapter for JEE 2027 Physics. It deals with temperature, different temperature scales, thermal expansion, thermal stress, calorimetry, change of phase, and heat transfer. Understanding the concepts and equations covered in this chapter helps students solve conceptual and numerical problems more effectively.
We have prepared clear and concise notes that include important concepts, equations, and question patterns covered in the study material. Students aspiring for JEE 2027 can definitely refer to these topics and boost their preparation.
Why Thermal Properties of Matter is Important for JEE?
Thermal Properties of Matter includes numerical and conceptual problems based on temperature measurement, thermal expansion, calorimetry, change of phase, and heat transfer. It’s being noted that this particular chapter carries a weightage of 2.08%, which is around 4 to 8 marks, but at times these marks can be a helping hand to clear the exam . So make sure that you learn this chapter at its best.
Students should understand the equations associated with each topic and practise their application in numerical problems & can usually expect questions from:
- Thermometry
- Scales of Temperature
- Relation Between Celsius and Fahrenheit
- Thermal Expansion
- Area Expansion
- Volume Expansion
- Thermal Stress in a Rigidly Fixed Rod
- Calorimetry and Heat Transfer
- Change of Phase
- Heat Transfer
- Thermal Conductivity
- Thermal Resistance
Practice Thermal Properties of Matter Questions with Solutions
Get concept focused Thermal Properties of Matter questions with detailed solutions and important formulas to strengthen your understanding and improve speed and accuracy for JEE 2027.
Practice Thermal Properties QuestionsTopics Covered in the Notes and a Quick Revision of Some Important Concepts for Thermal Properties of Matter
These notes focus on the important concepts and equations related to temperature, thermal expansion, thermal stress, calorimetry, change of phase, and heat transfer.
Students can check the topics covered in the revision notes from the list given below.
1. Thermometry
Thermometry deals with the measurement of temperature. The PDF introduces temperature measurement using a thermometric property and establishes a relation between the temperature of a body and the corresponding thermometric scale.
The general relation given is:
2. Thermal Expansion
Thermal expansion refers to the expansion of a substance when its temperature increases.
For linear expansion, the coefficient of linear expansion is given by:
The final length can be written as:
where L0 is the original length, and L is the length after the temperature change.
3. Thermal Stress in a Rigidly Fixed Rod.
When a rod is rigidly fixed and cannot expand freely due to a change in temperature, thermal stress is developed.
Thermal Stress = YαΔT
Where:
Y = Young’s modulus
α = coefficient of linear expansion
ΔT = change in temperature
The corresponding thermal strain is related to the temperature change as:
Thermal strain = αΔT
4. Change of Phase
It is the physical transition of a substance from one state of matter (like solid, liquid, or gas) to another by adding or removing thermal energy
The notes also include problems involving a change of phase, such as situations involving ice, water, steam, and other states of matter.
For heat involved during a change of phase, the equation used is:
Q=mL
where:
- Q = heat required or released
- m = mass
- L= latent heat
For example, the heat required to change the temperature of a substance is calculated using:
Q = msΔT
while the heat involved during the phase change is:
Q = mL
JEE Preparation Tips for Thermal Properties of Matter
If aspirants follow these steps, it can be helpful to learn and revise this chapter more comfortably:
- Understand the basic concepts before attempting numerical questions.
- Revise the temperature-scale equations.
- Practise Celsius & Fahrenheit conversion problems.
- Memorise the relations between α, β, and γ.
- Practise numerical problems based on linear, area, and volume expansion.
FAQ's
Important topics include temperature scales, Celsius-Fahrenheit relation, thermal expansion, thermal stress, calorimetry, change of phase, and heat transfer.
Yes, the chapter contains conceptual and numerical problems based on temperature, thermal expansion, calorimetry, phase changes, and heat transfer.
First, understand the concepts and formulas, then practise numerical problems on thermal expansion, calorimetry, change of phase, and heat transfer.
Questions can involve temperature conversion, thermal expansion, thermal stress, calorimetry, change of phase, and heat transfer.
Revise the concepts and formulas from the chapter and practise numerical problems regularly.