standard molar entropy definition
Standard molar entropy is a thermodynamic and chemical term that refers to the prescribed entropy of 1 mole of pure substance under standard conditions. It is usually represented by the So symbol. At 0K, the entropy value of pure solids and pure liquids is equal to zero, which is only a thermodynamic rule, it does not involve the change of the state of microscopic particles in the atomic nucleus. In the standard state, the entropy of a 1mol substance is called the standard molar entropy of the substance.