Enter the temperature of the air mass into the calculator to determine the enthalpy of that air mass.

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## Air Enthalpy Formula

The following formula is used to calculate the enthalpy of air.

E = 1.007 X T – .026

- Where E is the enthalpy (KJ/kg)
- T is the temperature (C)

## Air Enthalpy Definition

**What is air enthalpy? **The enthalpy of air is defined as the total energy per unit of mass of an isolated area of air at a constant temperature.

## Example Problem

How to calculate air enthalpy?

**First, determine the temperature of the air.**For this example, the air mass has a temperature of 60 degrees Celsius.

**Next, determine the enthalpy.**Using the formula above, calculate the enthalpy. E = 1.007 * 60 – .026 = 60.42 KJ/kg.

**Finally, convert into the necessary units.**For this problem, we want to convert to J/kg, so we need to multiply the result by 1000. 60.42 KJ/kg * 1000 = 60,420 J/kg.

## About Air Enthalpy

**Is the enthalpy of moist and dry air the same? **The enthalpy between dry air and moist air will be different because moist air also contains water in its mixture.