Thermodynamics
Thermodynamics is one of the most important chapters in JEE Main Physics.
It deals with heat, work, internal energy, thermodynamic processes, and laws of thermodynamics.
This chapter connects physical concepts with mathematical problem-solving and has high exam relevance.
Topics Covered
- Thermal Equilibrium
- State Variables
- Equation of State
- Internal Energy
- Heat and Work
- First Law of Thermodynamics
- Second Law of Thermodynamics
- Isothermal Process
- Adiabatic Process
- Isochoric Process
- Isobaric Process
- Carnot Engine
- Efficiency of Heat Engine
- Refrigerator and Heat Pump
Important Formulas
First Law of Thermodynamics:
ΔQ = ΔU + ΔW
Work Done in Isothermal Process:
W = nRT ln(V₂/V₁)
Work Done in Isobaric Process:
W = PΔV
Efficiency of Heat Engine:
η = W/Q₁
Carnot Efficiency:
η = 1 − T₂/T₁
Adiabatic Relation:
PVγ = Constant
JEE Main Preparation Tips
- Understand all thermodynamic processes through PV diagrams.
- Memorize key formulas for work, heat, and efficiency.
- Practice numerical problems on Carnot engine and gas processes.
- Focus on conceptual questions from laws of thermodynamics.
- Solve previous year JEE Main questions for exam readiness.
