Change in Enthalpy Calculator

Formula

The formula to calculate the Change in Enthalpy (dH) is:

\[ dH = dU + dP \cdot dV \]

Where:

\( dH \) is the change in enthalpy in Joules
\( dU \) is the change in internal energy in Joules
\( dP \) is the change in pressure in Pascals
\( dV \) is the change in volume in cubic meters

Definition

Change in Enthalpy (dH): The total heat content change in a system, accounting for internal energy change and work done by pressure-volume changes.
Significance: Used in thermodynamics to understand energy changes in chemical reactions and physical processes.

Example

Let's say the change in internal energy (dU) is 500 J, the change in pressure (dP) is 1000 Pa, and the change in volume (dV) is 0.02 m³. Using the formula:

\[ dH = 500 + (1000 \cdot 0.02) = 520 \]

So, the Change in Enthalpy (dH) is 520 J.

Extended information about "Change-in-Enthalpy-Calculator"

Change in Enthalpy Calculator for HVAC

Definition: Calculate the change in enthalpy for HVAC systems.

Formula: \( \Delta H = m \times c_p \times \Delta T \)

\( \Delta H \): Change in enthalpy
\( m \): Mass flow rate (in kg/s)
\( c_p \): Specific heat capacity at constant pressure (in J/(kg·K))
\( \Delta T \): Change in temperature (in K)

Example: \( \Delta H = 2 \times 1005 \times 10 \)

\( m \): 2
\( c_p \): 1005
\( \Delta T \): 10