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Thermodynamics — Formula Sheet

Punjab Board · Class 11 · Chemistry

5 formulas from Thermodynamics (Punjab Board Class 11 Chemistry) on one page, grouped by topic. Includes WORK (w), At constant pressure and Relationship.

45 questions25 flashcards5 formulas & key relations5 concepts

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A diagram illustrating the three types of thermodynamic systems: open, closed, and isolated, showing the exchange of matter and energy with the surroundings.
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5 Entries · 3 Sections

Formulas and Key Relations

Internal Energy, Work, Heat, and the First Law of Thermodynamics

WORK (w)

When external pressure pex compresses a gas from Vi to Vf, work done on system = w = −pex × ΔV.

Enthalpy (H), Heat Capacity, and Relationship Between ΔH and ΔU

At constant pressure

ΔH = qp. Heat absorbed at constant pressure equals change in enthalpy.

Relationship

ΔH = ΔU + ΔngRT, where Δng = moles of gaseous products − moles of gaseous reactants.

Key relations

Work (w) in chemistry primarily refers to pressure-volume work: w = -pΔV.

Calorimetry measures heat changes

q = CΔT, where C is heat capacity.

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Frequently Asked Questions

What are the important topics in Thermodynamics for Punjab Board Class 11 Chemistry?
Key topics in Thermodynamics include Basic Thermodynamic Terms: System, Surroundings, and Types of Systems, Internal Energy, Work, Heat, and the First Law of Thermodynamics, Enthalpy (H), Heat Capacity, and Relationship Between ΔH and ΔU, Enthalpy Changes: Standard Enthalpy, Formation, Combustion, Hess's Law. Study these first, then practise questions on each for Class 11 exams.
How many formulas are in Thermodynamics?
This sheet lists 5 formulas from Thermodynamics, grouped by topic. Learn what each symbol stands for so you can apply the formula, not just recall it.
How should I revise Thermodynamics for Class 11 exams?
Learn the core ideas first, then work through the 45 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.

More resources for Thermodynamics

All Punjab Board Class 11 Chemistry Formula Sheet

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