Physics

Enthalpy Calculator

Find enthalpy from internal energy, pressure and volume.

Internal energy (J)

Pressure (Pa)

Volume

Calculated Output

Enthalpy (J) 7,026.5

Formula: H = U + P·V

Step-by-Step Breakdown

1. Values used:

2. Internal energy = 5,000 J

3. Pressure = 101,325 Pa

4. Volume = 0.02

6. Enthalpy = 7,026.5J

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The math behind it

H = U + P·V. Changes in enthalpy equal the heat exchanged at constant pressure.

U = 5000 J, P = 101325 Pa, V = 0.02 m³ → about 7026 J.

Why use enthalpy?

It conveniently tracks heat for constant-pressure processes, common in chemistry.