Enter the change in pressure (N/m^2) and the change in volume (m^3) into the calculator to determine the Enthalpy From Pressure. 

Enthalpy From Pressure Formula

The following formula is used to calculate the Enthalpy From Pressure. 

Ep = dP*dV
  • Where Ep is the Enthalpy From Pressure (J)
  • dP is the change in pressure (N/m^2) 
  • dV is the change in volume (m^3) 

To calculate the enthalpy from pressure, multiply the change in pressure by the change in volume.

How to Calculate Enthalpy From Pressure?

The following two example problems outline how to calculate the Enthalpy From Pressure.

Example Problem #1:

  1. First, determine the change in pressure (N/m^2). In this example, the change in pressure (N/m^2) is given as 13.
  2. Next, determine the change in volume (m^3). For this problem, the change in volume (m^3) is given as 4.
  3. Finally, calculate the Enthalpy From Pressure using the equation above: 

Ep = dP*dV

Inserting the values from above and solving the equation: 

Ep = 13*4 = 52 (J)


Example Problem #2: 

Using the same process as above, first define the variables required by the formula. In this case, these values are provided as the following:

change in pressure (N/m^2) = 16

change in volume (m^3) = 8

Entering these values gives:

Ep = 16*8 = 128 (J)