Chapter 14, Problem 3STP

Interpretation Introduction

Interpretation:

An intensive physical property needs to be identified.

Concept introduction:

All the properties of matter are either physical or chemical properties and physical properties are either intensive or extensive.

Intensive property is a physical property of matter that does not depend on the amount of the substance or matter present. Examples of intensive properties include temperature, refractive index, density, and hardness of an object.

Extensive property is a physical property that depends on the amount of matter. It will change if the amount of matter changes. Examples of extensive properties include mass, volume, length, energy, moles etc.

Answer to Problem 3STP

Answer is C. Hardness is an intensive physical property.

Explanation of Solution

Hardness is only an intensive physical property among them as it does not depend on the amount of the matter present. Mass, volume and length are the example of extensive properties of matter as they will change if the amount of matter changes.

Conclusion

Reasons for incorrect options:

Hardness is only an intensive physical property among them as it does not depend on the amount of the matter present. Mass, volume and length are the example of extensive properties of matter as they will change if the amount of matter changes.

That makes mass, volume and length an incorrect option.