1.Heat Engine :Any device which converts heat energy continuously into mechanical work is called Heat engine. e.g. (i) When water is boiled in vessel closed by a lid, then the steam generated inside through the lid off, showing thereby that Read More …

# Category: Thermodynamics

## 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. Read More …

## 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 Read More …

## 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 Read More …

## 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 Read More …

## Joule’s Law for a Perfect Gas

If a fixed mass of gas is allowed to expand without doing external work under the condition that no heat enters or leave the gas, i.e. the gas is allowed to undergo free expansion, then If the molecules of the Read More …

## Specific Heat of Gas (Relation b/w Cp & Cv)

1. Specific Heat of a Gas: “The amount of heat required to produce a given change in temperature of a given mass is known as Heat Capacity “. Suppose Q is the heat given to a body and its temperature Read More …

## First Law of Thermodynamics & Its limitations

1. Explain First Law of Thermodynamics ? According to this law, ” the total energy supplied to the system is spend partially in increasing increasing internal energy of the system & the rest of energy is spend in Read More …

## Heat, Internal Energy & Work – Thermodynamics

(i) Heat Heat is defined as flow of energy from one point to another. Thermodynamically heat is defined as flow of energy from one body to another on account of difference in temperature. ♦ If the system absorbs the heat Read More …