# Joule-Thomson Coefficient

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**Formula:**`μ = (T2 - T1) / (P2 - P1)`

## Introduction to Joule-Thomson Coefficient

The Joule-Thomson coefficient (μ) describes the change in temperature of a gas as it expands or is compressed at constant enthalpy. This formula calculates the Joule-Thomson coefficient based on the initial and final temperatures and pressures of the gas. In this formula, ** μ** represents the Joule-Thomson coefficient,

**is the initial temperature,**

*T1***is the final temperature,**

*T2***is the initial pressure, and**

*P1***is the final pressure.**

*P2*## Parameters:

`T1`

= initial temperature of the gas (in Kelvin)`T2`

= final temperature of the gas (in Kelvin)`P1`

= initial pressure of the gas (in Pascals)`P2`

= final pressure of the gas (in Pascals)

## Output:

`μ`

= Joule-Thomson coefficient

## Data validation

Ensure temperatures are in Kelvin and pressures are in Pascals.

Tags: Thermodynamics, Physics, Gas, Enthalpy, Coefficient