Question

When Mrs. Green describes the physical properties of matter she said that physical properties often concern changes in state. One physical property that does not describe a change in state is

Answer 1

Density is a physical property of matter that does not involve a change in state, unlike melting or boiling points.

Step-by-step explanation:

When discussing physical properties of matter, we refer to the characteristics that can be observed without altering the chemical composition of a substance. A physical property of matter that does not describe a change in state is density. Compared to changes in state, such as melting or boiling, density is an intensive property that remains constant regardless of the amount of substance present and does not involve a transition between solid, liquid, or gas phases. Other examples of physical properties not associated with a change in state include color, hardness, and electrical conductivity.

Answer 2

Properties of matter can be broadly classified into two categories:

-Physical properties, these usually involve a change in the state of matter

-Chemical properties. these involve a change in the chemical composition of matter.

Now, physical properties can be further classified as:

Extensive: these depend on the amount of the substance, eg: mass, volume

Intensive: these do not depend on the amount of the substance eg: density, color, melting point, boiling point

A physical property that does not describe a change in state is color. For example: copper sulfate is a compound which is a blue in color. Thus, color provides information which describes the appearance of matter. In contrast, properties like melting or boiling point suggests a change in the state of the substance.