Video Lecture: Claussius Clayperon and the Second Law of Thermodynamics

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Two video lectures titled, ‘The Second Law of Thermodynamics – Clausius Clapeyron Relation’ and ‘Clausius Clapeyron Relation (Contd.)’ from the e-learning course, ‘Introduction to Atmospheric Science’ developed by C Balaji, IIT Madras, for National Programme on Technology Enhanced Learning (NPTEL), India. These video lectures provide details about the second law of thermodynamics, Clausius Clapeyron equation, Carnot cycle, and entropy,. It also discusses radiation laws, radiative transfer, Prevost’s theory, wave theory, particle theory, and black body behaviour. 

Students will learn about the Clausius Clapeyron equation, how saturated vapour pressure changes with temperature, and the impact of temperature and pressure changes on water vapour and earth’s climate. They will also learn how to calculate the reversible and adiabatic process called the isentropic process and quasistatic processes.

A transcript of the lecture is also provided.

Use this tool to help your students find answers to:

  1. Define the following:
  1. the Second Law of Thermodynamics 
  2. the Clausius Clapeyron equation
  3. Entropy
  4. Radiative transfer
  5. Adiabatic Process
  6. Prevost’s theory
  1. How does height, pressure and water vapour percentage impact the atmospheric temperature?
  2. How can mechanical engineers contribute to reduce global warming using the second law of thermodynamics?

About the tool

Tool NameLecture – 29: The Second Law of Thermodynamics – Clausius Clapeyron Relation and Lecture – 30: Clausius Clapeyron Relation (Contd.)
DisciplinePhysics, Earth Sciences
Topic(s) in DisciplineClimate Physics, Atmospheric Sciences, Atmospheric Physics, Second Law of Thermodynamics, Thermodynamics, Clausius Clapeyron equation, Radiative Transfer, Prevost’s Theory
Climate TopicClimate and the Atmosphere
Type of toolVideo Lecture (42 mins and 45 mins)
Grade LevelUndergraduate, Graduate
Developed byC Balaji, IIT Madras
Hosted atNPTEL (
LinkLink 1, Link 2
Computer SkillsBasic
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