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Chapter 23 of 29
Revision Notes

Thermodynamics

Kerala Board · Class 12 · Physics

Quick revision notes for Thermodynamics — Kerala Board Class 12 Physics. Key concepts, formulas, and definitions for last-minute revision.

43 questions20 flashcards5 concepts

Key Topics to Revise

1

Basic Concepts and Terminology

  • Heat is energy in transit due to temperature difference between two bodies
  • Temperature is the property that determines thermal equilibrium between bodies
  • System can be open (exchanges mass and energy), closed (exchanges only energy), or isolated (no exchange)
2

Thermodynamic Processes

  • Isothermal process occurs at constant temperature (T = constant)
  • Adiabatic process occurs with no heat exchange (Q = 0)
  • Isobaric process occurs at constant pressure (P = constant)
3

Zeroth Law of Thermodynamics

  • If system A is in thermal equilibrium with C, and B is in thermal equilibrium with C, then A and B are in thermal equilibrium
  • Provides basis for temperature measurement
  • Establishes transitivity of thermal equilibrium
4

Internal Energy and First Law

  • Internal energy U is sum of kinetic and potential energies of molecules
  • Internal energy is a state function - depends only on current state
  • First Law: ΔU = Q - W (energy conservation for thermodynamic systems)

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Full Notes

Key Concepts

Heat is energy in transit dueSystems are classified as open (exchangeIf system A is in thermalInternal energy (U) is the sumKelvin

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Frequently Asked Questions

What are the important topics in Thermodynamics for Kerala Board Class 12 Physics?

Thermodynamics covers several key topics that are frequently asked in Kerala Board Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.

Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.