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Thermodynamics — Syllabus

CBSE · Class 11 · Chemistry

What Thermodynamics covers in CBSE Class 11 Chemistry: 4 topics, for the 2026-27 session. Part of the CBSE Class 11 Chemistry syllabus.

116 questions92 flashcards10 formulas & key relations5 concepts

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4 Topics · CBSE Class 11 Chemistry · 2026-27

Topics in Thermodynamics

1

1. Basic thermodynamic terms

  • The universe is composed of the system plus the surroundings.
  • A system is that part of the universe in which observations are made.
  • Surroundings mean everything other than the system.
2

2. Internal energy, heat, work, and the first law

  • Internal energy is the total energy of the system, including chemical, electrical, and mechanical energy.
  • Internal energy changes when heat is transferred, work is done, or matter enters or leaves the system.
  • Work done on the system increases internal energy; work done by the system decreases it.
3

3. Work, pressure-volume work, and reversible processes

  • In chemistry, the most common work is pressure-volume work.
  • For expansion against constant external pressure, work is negative because the system does work on the surroundings.
  • For compression, work is positive because work is done on the system.
4

4. Enthalpy and relation between ΔH and ΔU

  • Enthalpy is a useful state function for reactions at constant pressure.
  • Enthalpy is defined as H = U + pV.
  • At constant pressure, heat absorbed by the system equals the enthalpy change.

Key Concepts

Central concept: Thermodynamics in Chemistry

Thermodynamic system and surroundingsTypes of systemsState of a systemInternal energyFirst law of thermodynamicsWork in thermodynamicsHeat in thermodynamicsEnthalpy

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Frequently Asked Questions

What are the important topics in Thermodynamics for CBSE Class 11 Chemistry?
Key topics in Thermodynamics include Basic thermodynamic terms, Internal energy, heat, work, and the first law, Work, pressure-volume work, and reversible processes, Enthalpy and relation between ΔH and ΔU. Study these first, then practise questions on each for Class 11 exams.
How should I revise Thermodynamics for Class 11 exams?
Learn the core ideas first, then work through the 116 practice questions on Thermodynamics. Revise definitions regularly and use flashcards for quick recall 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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All CBSE Class 11 Chemistry Syllabus

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