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) 

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)