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Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

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Chapter
Section
BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem

Use molecular-level drawings to show the difference between physical and chemical changes.

Interpretation Introduction

Interpretation:

To determine the difference between physical and chemical changes using the molecular-level drawings.

Concept Introduction:

In a chemical compound, molecule are the tiny units that shows physical and chemical properties. When these compounds undergo changes, the chemical and physical properties of the compound changes under specific conditions exhibiting new changes.

Explanation

Chemical change:

When a substance undergoes changes that alters the chemical properties of the compound, where new chemical compound is formed with the chemical change. This chemical change is due to the change in the level of molecules. When this chemical change takes place, the molecules of the substance break or it forms a new substance during the change that occurs chemically. The key characteristics of the chemical change are:

  • When chemical changes occur, characteristics such as light, gas, color, heat indicates the change.
  • It forms one or more new substances.
  • It can form precipitates.

The example of chemical change is such that when the iron substance gets rusted, it changes to iron oxide because of the oxygen in the atmosphere as shown below:

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