Volume, mass, and energy are examples of which property type?

• A. Intensive Properties
• B. Extensive Properties
• C. State Properties
• D. Phase Properties

Answer: (B)

Extensive properties are those that depend on how much material is present. Volume, mass, and energy all scale with the size of the system—if you double the amount of substance, these properties roughly double. That behavior—adding more substance increases the property value—defines them as extensive.

In contrast, intensive properties do not depend on the amount of material. Temperature, pressure, and density stay the same when you scale the system, assuming the conditions are uniform. Phase properties relate to the state of the matter (solid, liquid, gas) or to phase-change characteristics, which is a different concept from whether a property scales with quantity.