An example of an extensive property of a substance is?

Mass is an extensive property because it depends on the amount of material present in a substance. In thermodynamics, extensive properties are those that change when the size of the system changes. This means that if you have a larger sample of a substance, it will have more mass than a smaller sample of the same substance.

In contrast, intensive properties, such as boiling point and freezing point, are characteristic of the substance itself and do not change with the size or amount of the material. Colour is also an intensive property, as it is inherent to the substance and remains the same regardless of the quantity present. Thus, mass clearly stands out as the correct example of an extensive property.