Practice Micro-to-Macroscopic Behavior - CSIR-UGC NET Offered by Unacademy

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Micro-to-Macroscopic Behavior

Quick practice

Question 1 of 5

The free energy F of a system depends on a thermodynamic variable $\psi$ as $F=-a \psi^{2}+b \psi^{6}$ with . The value of , when the system is in thermodynamic equilibrium, is –

A

Zero

B

$\pm\left(\frac{a}{6 b}\right)^{\frac{1}{4}}$

C

$\pm\left(\frac{a}{3 b}\right)^{\frac{1}{4}}$

D

$\pm\left(\frac{a}{b}\right)^{\frac{1}{4}}$