This quantity equals the negative partial derivative of the grand potential with respect to temperature. Ignoring the indistinguishability of particles leads to a non-extensive form of this quantity (10[1])in the Gibbs paradox. Like temperature, the Carnot cycle contains two steps in which this quantity is constant. (10[1]-5[5])This quantity was defined as proportional to the natural logarithm of the number of microstates by Ludwig Boltzmann. (10[3])The “arrow of time” is defined (10[2])because this quantity (10[1])is non-decreasing for isolated systems (10[1])by the Second Law of Thermodynamics. For 10 points, name this quantity that is informally the amount of disorder in a system. (10[3])■END■ (10[1]0[1])