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_{[itex]\epsilon[/itex]}=A+B[itex]\epsilon[/itex], where a and b are constants. Show that B=2bV/T

^{2}and find the isothermal dielectric constant [itex]\kappa[/itex]

_{el}. Use properties of G(T,[itex]\epsilon[/itex])

I'm really not sure where to start with this one. Any help is apreciated to get going in the right direction.

I know εV

_{el}/a

The only think I found in my notes is that C

_{[itex]\epsilon[/itex]}=-T(∂

^{2}G/∂T

^{2})

_{ε}but I'm not sure how that plays into the question..