The experimental value of the molar entropy of 1 mol NO at 0 K is about 5 J.K^-¹.We can conclude that in the crystal the molecules of NO are arranged randomly.

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The third law of thermodynamics states that the entropy of a perfect crystal at 0 K is zero. The experimental value of the molar entropy of 1 mol NO at 0 K is about 5 J.K^-¹, which is not zero. This indicates that the molecules of NO in the crystal are not arranged randomly.

The Experimental Value of the Molar Entropy of 1 Mol