This document discusses thermodynamic properties of systems. It defines thermodynamic properties as measurable entities that can represent a system at a given time, such as temperature, pressure, mass, volume, density, enthalpy and entropy. Thermodynamic properties are either intensive or extensive, where intensive properties do not depend on the mass of the system and extensive properties do depend on the mass. The document provides examples of temperature as an intensive property and volume, density and enthalpy as extensive properties. It concludes with a thank you.