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Chapter 1: Problem 27

Can an extensive property be used to identify a substance? Explain why or why not.

Short Answer

Expert verified
Explain your answer. Answer: No, an extensive property cannot be used to identify a substance because it depends on the amount of material present and does not provide unique information about the substance. Instead, we need to rely on intensive properties that are independent of the amount of material and unique to the substance for identification purposes.

Step by step solution

01

Understanding Extensive Properties

Extensive properties are properties of matter that depend on the amount of material present. Examples of extensive properties include mass, volume, and energy content. These properties change based on how much substance is being considered.
02

Identifying Substances

Identification of a substance usually involves determining or describing its properties or characteristics that are specific to that substance. To identify a substance, we generally use its intensive properties, which do not depend on the amount of material present, such as density, melting point, and boiling point.
03

Extensive Properties and Identification

The question is whether an extensive property can be used to identify a substance. To determine this, consider a situation where we have two samples of an unknown substance with different masses. If we only know the mass (an extensive property) of each sample, it does not provide enough information to identify the substance as there could be many substances with the same mass.
04

Conclusion

Therefore, an extensive property cannot be used to identify a substance because it depends on the amount of material present and does not provide unique information about the substance. To identify a substance, we need to rely on the intensive properties that are independent of the amount of material and unique to the substance.

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