# 20 Appendix: Thermodynamics

The thermodynamical calculations performed by VIEWMOL are using the following formulas:

- Enthalphy
  - Translation
  - pV (molecule)
  - pV (solid)
  - Rotation (linear molecule)
  - Rotation (non-linear molecule)
  - Vibration

    | (1)

- Entropy
  - Translation

    | (2)

  - Rotation (linear molecule)

    | (3)

  - Rotation (non-linear molecule)

    | (4)

  - Vibration

    | (5)

- Heat capacity
  - Translation
  - Rotation (linear molecule)
  - Rotation (non-linear molecule)
  - Vibration

    | (6)

gas constant, temperature, pressure, volume, Avogadro's number, Planck's number, speed of light, wave number, Boltzmann's number, molecular mass, , , and rotational constants, symmetry number. Only wave numbers which are larger than 10 cm-1 are included.