Enter the change in temperature from T1 to T2 (C) and the change in pressure from P1 to P2 (Pa) into the Joules Thomson Coefficient Calculator. The calculator will evaluate the Joules Thomson Coefficient. 

Joules Thomson Coefficient Formula

The following two example problems outline the steps and information needed to calculate the Joules Thomson Coefficient.

JTC = dT / dP

Variables:

  • JTC is the Joules Thomson Coefficient (C/Pa)
  • dT is the change in temperature from T1 to T2 (C) 
  • dP is the change in pressure from P1 to P2 (Pa) 

How to Calculate Joules Thomson Coefficient?

The following steps outline how to calculate the Joules Thomson Coefficient.


  1. First, determine the change in temperature from T1 to T2 (C). 
  2. Next, determine the change in pressure from P1 to P2 (Pa). 
  3. Next, gather the formula from above = JTC = dT / dP.
  4. Finally, calculate the Joules Thomson Coefficient.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

change in temperature from T1 to T2 (C) = 50

change in pressure from P1 to P2 (Pa) = 150

JTC = dT / dP = ?