The infinitesimal external work required to increase the overall dipole moment of a uniformly polarised dielectric substance from p to p + dp in an electric field E is SW = Edp. i. Show that the Gibbs free energy is given by dG = -SdT-pdE. Establish the Maxwell relation: ii. (35), = (77), The polarisation per unit volume of a dielectric substance is given by: =c²₁ where E and C are constants and V is the (constant) volume of the system. iii. Using a suitable Maxwell relation and the equation of state show that: (OUT) += = 0
The infinitesimal external work required to increase the overall dipole moment of a uniformly polarised dielectric substance from p to p + dp in an electric field E is SW = Edp. i. Show that the Gibbs free energy is given by dG = -SdT-pdE. Establish the Maxwell relation: ii. (35), = (77), The polarisation per unit volume of a dielectric substance is given by: =c²₁ where E and C are constants and V is the (constant) volume of the system. iii. Using a suitable Maxwell relation and the equation of state show that: (OUT) += = 0
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Transcribed Image Text:The infinitesimal external work required to increase the overall dipole moment of a uniformly polarised
dielectric substance from p to p + dp in an electric field E is SW = Edp.
i. Show that the Gibbs free energy is given by dG = -SdT - pdE.
Establish the Maxwell relation:
ii.
as
(35), = (77) E
The polarisation per unit volume of a dielectric substance is given by:
B=C²0²
Р
€ E
where E and C are constants and V is the (constant) volume of the system.
iii. Using a suitable Maxwell relation and the equation of state show that:
(F)
T
= 0
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