Are these Thermodynamics handwritten notes free?

Yes. Fill in the short form on this page and the PDF downloads right away. There is no charge.

Are these official university notes?

No. These are original Uncodemy revision notes for Thermodynamics. They are not issued by AKTU or any other university and are not a copy of university material.

Which syllabus do the Thermodynamics notes follow?

They follow the common topics of Indian B.Tech Mechanical syllabi for Thermodynamics. Unit names and order differ by university, so check your own syllabus and skip or add topics as needed.

Do the notes include steam tables?

No. The notes explain how to use steam tables and the Mollier chart. Use the steam tables your university allows.

Are power cycles covered?

Yes. Unit 8 covers air standard cycles such as Otto, Diesel and Brayton, and the Rankine cycle with reheat and regeneration.

Is this the same as Engineering Thermodynamics or Basic Thermodynamics?

Yes, the content matches the common syllabus for both names. Check your own syllabus for the exact units.

Thermodynamics Handwritten Notes PDF

Key takeaways

Original Uncodemy revision notes on Engineering Thermodynamics in 8 units plus a practice question list.
Worked examples on nozzle exit velocity, a Carnot engine, entropy change of water and adiabatic compression of air.
SFEE applications, entropy and power cycles carry most numerical marks.
Not official university notes. Check your own syllabus and allowed steam tables.
Free download after a short form.

About these Thermodynamics notes

These are original Uncodemy revision notes for Thermodynamics, written by the Uncodemy trainer team in a clean handwritten style. They follow the topics found in the common Indian B.Tech Mechanical syllabus. They are not official university notes, not a textbook and not a copy of any university's material. Unit names, order and depth differ between universities (AKTU, state technical universities and autonomous colleges all use their own scheme), so check your own syllabus and tick the units you need before you start.

Thermodynamics is the base for IC Engines, RAC, Heat Transfer and power plant subjects. The notes keep sign conventions and assumptions clear so later subjects are easier.

Each unit has short definitions, key formulas in highlighted boxes, comparison tables, "remember" points and worked examples with the steps shown. A list of commonly asked practice questions closes the notes. These are practice questions based on common syllabus topics, not verified past papers.

What's inside the Thermodynamics notes

The PDF has 8 units plus a practice question list. Here is what each unit covers, so you can match it with your syllabus.

Unit 1: Basic Concepts

System and surroundings: closed, open and isolated systems.
Properties and processes: state, process, cycle, intensive and extensive properties, and the zeroth law.

Unit 2: Work and Heat

Sign convention: work and heat as path functions.
Ideal gas processes: work for isobaric, isochoric, isothermal, adiabatic and polytropic processes.

Unit 3: First Law of Thermodynamics

First law for closed systems: internal energy and enthalpy.
Steady flow energy equation: applied to nozzles, turbines, compressors and throttling.

Unit 4: Second Law of Thermodynamics

Kelvin-Planck and Clausius statements: and why they are equivalent.
Heat engine, refrigerator, heat pump: efficiency, COP and the Carnot limit.

Unit 5: Entropy

Clausius inequality: entropy as a property and the principle of increase of entropy.
Entropy change: for ideal gases, liquids and mixing problems.

Unit 6: Availability

Available energy and irreversibility: exergy and the Gouy-Stodola theorem.

Unit 7: Properties of Pure Substances

Phase change and steam tables: dryness fraction and the use of steam tables and Mollier chart.
Thermodynamic relations: Maxwell relations and related equations in short.

Unit 8: Gas Power and Vapour Power Cycles

Air standard cycles: Otto, Diesel and Brayton cycles.
Rankine cycle: basic cycle, reheat and regeneration.

How to revise Thermodynamics

Thermodynamics is about choosing the right system and law. Practise setting up problems.

Draw the system boundary first: decide if the system is closed or open before writing equations.
Keep one sign convention: use the same convention for work and heat in every problem.
Learn SFEE applications as a table: what terms drop out for a nozzle, turbine, compressor and throttle.
Practise steam tables: find dryness fraction, enthalpy and entropy for given states.
Redo the worked numericals: they cover the first law, second law, entropy and processes.

Exam focus: high-weightage Thermodynamics topics

These topics are common across syllabi:

SFEE applied to nozzles, turbines, compressors and throttling.
Kelvin-Planck and Clausius statements and Carnot efficiency.
Clausius inequality and entropy change of the universe.
Availability and irreversibility.
Dryness fraction with steam tables and calorimeters.
Otto, Brayton and Rankine cycle efficiency.

Typical numericals worked in the notes

Steam nozzle with 100 kJ/kg enthalpy drop: exit velocity of about 447 m/s.
Carnot engine between 800 K and 300 K taking 1000 kJ: efficiency, work and heat rejected.
Entropy change of 1 kg of water heated from 300 K to 350 K: about 0.644 kJ/K.
Adiabatic compression of air with volume ratio 8: final temperature and work per kg.

Check answers with the Carnot efficiency calculator, the Otto and Diesel cycle efficiency calculator and the refrigeration COP calculator.

A 7-day revision plan for Thermodynamics

Use this plan in the week before your exam, after you have studied the subject once in class. Spend about two to three hours a day.

Day 1: Unit 1 (Basic Concepts), Unit 2 (Work and Heat). Read, close the PDF, then write the key formulas and definitions from memory.
Day 2: Unit 3 (First Law of Thermodynamics), Unit 4 (Second Law of Thermodynamics). Read, close the PDF, then write the key formulas and definitions from memory.
Day 3: Unit 5 (Entropy), Unit 6 (Availability). Read, close the PDF, then write the key formulas and definitions from memory.
Day 4: Unit 7 (Properties of Pure Substances). Read, close the PDF, then write the key formulas and definitions from memory.
Day 5: Unit 8 (Gas Power and Vapour Power Cycles). Read, close the PDF, then write the key formulas and definitions from memory.
Day 6: redo every worked example in the notes without looking at the solution, then check each step.
Day 7: attempt the practice question list at the end of the PDF in exam time, then go back to the units where you got stuck.

Who these notes are for

B.Tech semester exams: second-year Mechanical students (and other branches with a thermodynamics paper) preparing for Engineering Thermodynamics or Basic Thermodynamics.
GATE ME basics: thermodynamics is a core GATE ME topic; SFEE, Carnot, entropy, exergy, steam properties and power cycles are common. The notes cover basics and standard formulas; for GATE you still need a full question bank and previous papers from the official GATE site.
Interviews: thermal, power plant and HVAC roles often ask about the laws of thermodynamics, entropy and the Rankine cycle.
Diploma and lateral-entry students: the plain language and worked steps make the units easy to follow, but check which topics are in your own scheme.

How to use these notes with your textbook

These notes are short on purpose. They are meant for revision, not for learning Thermodynamics for the first time. Study each unit once from your class notes, a standard textbook or the matching NPTEL course, and then use the PDF to revise quickly. If a topic in your syllabus is missing from the notes, mark it in your syllabus copy and study it from your textbook. If your teacher uses a different method or notation, follow your teacher in the exam. You can also request notes for another subject through the Uncodemy handwritten notes request page.

Download Thermodynamics Handwritten Notes PDF