If entropy of a solid is greater than zero, at $\mathrm{T}=0$, it is called

If entropy of a solid is greater than zero, at $\mathrm{T}=0$, it is called
  1. standard entropy
  2. residual entropy
  3. formal entropy
  4. absolute entropy

Solution

If entropy of a solid is greater than zero, at \(T=0\), it is called residual entropy. $\textbf{Explanation:}$ The term "residual entropy" refers to the amount of entropy in a solid that is more than zero, as \(T=0\). It is the entropy difference between a non-equilibrium state and the crystal state of a substance near absolute zero. Carbon monoxide, which has a relatively small dipole moment, is a common example. Few carbon monoxide molecules have enough time to organise themselves into a flawless crystal as the carbon monoxide crystal cools to absolute zero.

Asked in: MHT CET 2020 (16 Oct Shift 2)

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