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Thermodynamics

Maharashtra Board · Class 12 · Physics

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

45 questions25 flashcards5 concepts

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Key Topics to Revise

1

4.1 Thermal Equilibrium and Zeroth Law

  • Thermal equilibrium occurs when two systems in contact reach the same temperature and no heat flows between them
  • The Zeroth Law states: If systems A and C are in thermal equilibrium, and A and B are in thermal equilibrium, then B and C are also in thermal equilibrium
  • This law enables temperature measurement using thermometers
2

4.2 Internal Energy, Heat, and Work

  • Internal energy (U) is the total energy of random molecular motion in a system
  • For ideal gas: U depends only on temperature
  • Heat (Q) is energy transferred due to temperature difference
3

4.3 First Law of Thermodynamics

  • First Law: ΔU = Q - W (energy conservation)
  • Alternative form: Q = ΔU + W
  • Energy cannot be created or destroyed, only converted
4

4.4 Thermodynamic Processes

  • Isothermal: Constant temperature (ΔT = 0, ΔU = 0 for ideal gas)
  • Isobaric: Constant pressure (ΔP = 0)
  • Isochoric: Constant volume (ΔV = 0, W = 0)

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Full Notes

Key Concepts

When two systems at different temperaturesInternal energy (U) is the totalDifferent ways a system can changeDevices that convert heat into workHas two statements

Frequently Asked Questions

What are the important topics in Thermodynamics for Maharashtra Board Class 12 Physics?
Thermodynamics covers several key topics that are frequently asked in Maharashtra Board Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Thermodynamics — Maharashtra Board Class 12 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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