The infinitesimal external work required to increase the overall dipole moment of a uniformly polariseddielectric 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) EThe polarisation per unit volume of a dielectric substance is given by:B=C²0²Р€ Ewhere 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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