## Heat Engine and Its Components

In this post, we will discuss heat engine and its components with the help of examples. Generally, heat engine consistsĀ of three main components i.e. Source, Sink, and Working substances. What is Heat Engine? A simple definition of Heat Engine, which defines it clearly is given below: Any device which converts heat energy continuously into mechanical … Read moreHeat Engine and Its Components

## Difference between Joule Expansion, Joule Thomson Expansion & Adiabatic Expansion…

Difference between Joule Expansion, Joule Thomson Expansion & Adiabatic Expansion from Harish Joshi

## Vanderwall’s Gas in Joule Thomson Expansion-Thermodynamics

Let us suppose one gram mole of a real gas allowed to expand through a porous plug from a pressure P1 and volume V1 to pressure P2 and volume V2.During this process suppose that temperature changes from T1 to T2. The gas will have to do external as well as internal work.  External work done … Read moreVanderwall’s Gas in Joule Thomson Expansion-Thermodynamics

## Joule-Thomson Expansion :Porous Plug Experiment

Joule-Thomson Expansion :Porous Plug Experiment Joule’s experiment based on free adiabatic expansion of a gas failed to detect the existence of intermolecular attractions. Therefore in 1952, in collaboration with Lord Kelvin(Thomson), he devised a very sensitive technique known as Porous Plug Experiment.Principle : The principle of Joule Thomson experiment consists in forcing a gas at a … Read moreJoule-Thomson Expansion :Porous Plug Experiment

## Expression for Joule’s coefficient – Thermodynamics

The change in temperature in free expansion of gas is expressed in terms of Joule’s coefficient which is given by : As In Vanderwall’s gas an internal pressure (P’=a/V^2) developed due to intermolecular attractions.  Therefore Internal work done in Joule’s expansion against internal pressure is : Due to decrease in internal kinetic energy, the temperature … Read moreExpression for Joule’s coefficient – Thermodynamics

## Vanderwall’s equation of State- Thermodynamics

The Joule’s law ( dU/dP) = 0 is true for a perfect gas only as it is based on assumption that, no intermolecular attractions existed in gas. PV = RT is an ideal gas equation also based on the assumption that molecules are infinitesimally small in size and collisions are perfectly elastic. But this equation is insufficient … Read moreVanderwall’s equation of State- Thermodynamics