Enthalpy of dielectrics

The enthalpy of a system with a dielectric medium can be expressed using its internal energy and the electric field and electric displacement.

Conditions:

1. The dielectric is isotropic whether or not the electric field is present.

2. The medium is homogeneous.

3. The volume change of the medium is insignificant.

Links:

1. Formula 31.5 on p. 122 of “General Course of Physics” (Obschiy kurs fiziki), vol. 3 by Sivukhin D.V. (1979).

enthalpy_density

enthalpy of the system per unit volume.

Symbol:

H

Latex:

\(H\)

Dimension:

energy/volume

internal_energy_density

internal_energy of the system per units volume.

Symbol:

U

Latex:

\(U\)

Dimension:

energy/volume

electric_field_strength

electric_field_strength in the medium.

Symbol:

E

Latex:

\(E\)

Dimension:

voltage/length

electric_displacement

electric_displacement in the medium.

Symbol:

D

Latex:

\(D\)

Dimension:

charge/area