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Chapter 1: Problem 72

The development of rust spots on an automobile body is an example of a _____ change. (physical or chemical)

Short Answer

Expert verified
The development of rust spots on an automobile body is an example of a chemical change.

Step by step solution

01

Define Physical and Chemical Changes

A physical change is a change in the form or state of the substance without altering its chemical composition. It is usually reversible. Examples include changes of state like solid to liquid or liquid to gas. A chemical change involves a change in the substance's chemical composition, resulting in the formation of new substances. These changes are often not easily reversible. Examples include rusting, burning, and digestion.
02

Identify the Change in the Formation of Rust Spots

Rusting is a chemical reaction known as oxidation, in which iron reacts with oxygen in the presence of water or moisture to form rust (iron oxide). This process involves a change in the chemical composition of iron, so it is classified as a chemical change.
03

Answer the Exercise:

Given the development of rust spots on an automobile body, we can determine that it is an example of a _chemical_ change.

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