Changes in this quantity due to mixing are the concern of the Gibbs paradox.
Changes in this quantity due to mixing are the concern of the Gibbs paradox. Given by   Boltzmann's constant times the log of the number of microstates, its changes may equal  heat divided by temperature. This state function is zero in a perfect (*) crystal at 0 Kelvin and it  cannot decrease in isolated systems, by the Second Law of Thermodynamics. Denoted S, for 10  points, name this quantity measuring a system's disorder.
Changes in this quantity due to mixing are the concern of the Gibbs paradox.
entropy (prompt on “S” before mentioned; do not accept “enthalpy”)