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Thermodynamics

Karnataka Board · Class 11 · Physics

Quick revision notes for Thermodynamics — Karnataka Board Class 11 Physics. Key concepts, formulas, and definitions for last-minute revision.

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Key Topics to Revise

1

11.1 Introduction and Basic Concepts

  • Thermodynamics is a macroscopic science dealing with bulk systems, not molecular details
  • Heat was historically thought to be a fluid called 'caloric' but is now understood as a form of energy
  • Benjamin Thomson's (Count Rumford) experiment in 1798 showed heat is produced by work, proving heat is energy
2

11.2 Thermal Equilibrium and 11.3 Zeroth Law

  • Thermal equilibrium occurs when macroscopic variables don't change with time
  • Adiabatic wall prevents heat flow; diathermic wall allows heat flow
  • Systems in thermal equilibrium have the same temperature
3

11.4 Heat, Internal Energy and Work

  • Internal energy (U) is sum of kinetic and potential energies of molecules in the rest frame of the system
  • Internal energy is a state variable - depends only on current state, not on path taken
  • Heat (Q) is energy in transit due to temperature difference
4

11.5 First Law of Thermodynamics

  • First law is conservation of energy applied to thermodynamic systems
  • Energy supplied to system goes into internal energy change and work done by system
  • For any process: ΔQ = ΔU + ΔW

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Full Notes

Key Concepts

When two systems are in thermalInternal energy is the sumHeat (Q) is energy transfer dueStates that ΔQ = ΔU +Specific heat capacity (s) is

Frequently Asked Questions

What are the important topics in Thermodynamics for Karnataka Board Class 11 Physics?
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How to score full marks in Thermodynamics — Karnataka Board Class 11 Physics?
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.

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