Which of the following thermodynamic properties are intensive properties?

1) Density

2) Entropy

3) Viscosity 

Explanation:

• Intensive Property: These are the properties of the system which are independent of mass under consideration. For e.g. Pressure, Temperature, density, composition, viscosity
• Extensive Properties: The properties which depend on the mass of the system under consideration. For e.g Internal Energy, Enthalpy, Mass, Volume, Entropy

​Important Points

All specific properties are intensive properties. For e.g. specific volume, specific entropy etc.