* Extensive Properties: These properties depend on the amount of matter present. Examples include mass, volume, and heat capacity. If you double the amount of substance, you double the value of the extensive property.
* Intensive Properties: These properties are independent of the amount of matter. Examples include density, temperature, and boiling point. They remain the same regardless of the amount of substance you have.
Volume per gram is essentially density, which is calculated as:
Density = Mass / Volume
Since density is a ratio of two extensive properties (mass and volume), it becomes an intensive property. It's a characteristic of the substance itself and doesn't change with the amount of the substance.
In summary: The volume per gram of a substance is an intensive property because it's equivalent to density, which is a property that remains constant regardless of the amount of substance.