According to the third law of thermodynamics which one of the following quantities for a perfectly crystalline solid is zero at absolute zero?
According to the third law of thermodynamics which one of the following quantities for a perfectly crystalline solid is zero at absolute zero?
A. Free energy
B. Entropy
C. Enthalpy
D. Internal energy
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Correct Answer - B
Entropy is the degree of randomness or disorder of the system. When the temperature of the system is zero kelvin, then all the motion of molecules ceases. According to third law of thermodynamics "At absolute zero the entropy of a perfectly crystalline substance is taken as zero".
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