Task: Text Categorization
Input (English): This property is the only one responsible for the direction of time's arrow. The change in this quantity multiplied by temperature and subtracted from the change in enthalpy gives Gibb's free energy. This property is measured in joules per Kelvin. The value of this quantity will either remain the same or increase according to the Second Law of Thermodynamics. For 10 points, name this measure that can never decrease in a closed system, and which is a measure of the amount of disorder in a system.
Output (English): Science