The standard for entropy is defined by a perfectly ordered _________ at 0 K.
molecule
crystal
metal
compound
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compound........... .....
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Answer : The correct option is, crystal.
Explanation :
According to the third Law of Thermodynamics, it states that the entropy of crystalline or perfectly ordered substance in the thermodynamic equilibrium approaches zero as the temperature approaches zero kelvin (0 K).
That means,
At T = 0 K
S = zero
Hence, the standard for entropy is defined by a perfectly ordered crystal at 0 K.
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