The Second Law of Thermodynamics suggests that this value has an "arrow of time," because it always increases over time.
Reversible adiabatic processes hold this quantity constant, and the Carnot cycle consists of expansions and compressions that keep either temperature or this quantity constant. For monoatomic ideal gases, this value is calculated by the Sackur-Tetrode equation. (*) Maxwell's Demon is able to decrease this value without expending work. The Second Law of Thermodynamics suggests that this value has an "arrow of time," because it always increases over time. For 10 points, what amount of energy unable to perform work is the measure of disorder in a system?
Reversible adiabatic processes hold this quantity constant, and the Carnot cycle consists of expansions and compressions that keep either temperature or this quantity constant.
{entropy}