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General, Organic, and Biological C...

7th Edition
H. Stephen Stoker
Publisher: Cengage Learning
ISBN: 9781285853918

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Section
BuyFindarrow_forward

General, Organic, and Biological C...

7th Edition
H. Stephen Stoker
Publisher: Cengage Learning
ISBN: 9781285853918
Chapter 1, Problem 1.16EP
Textbook Problem
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Classify each of the following changes as physical or chemical.

  1. a. Evaporation of water from a lake
  2. b. “Scabbing over” of a skin cut
  3. c. Cutting a string into two pieces
  4. d. Melting of some candle wax

(a)

Interpretation Introduction

Interpretation:

Evaporation of water from lake has to be classified as a chemical or physical change.

Concept Introduction:

In matter, changes are familiar and common occurrences.  Similar to the properties of matter, changes in matter can also be classified as physical change and chemical change.

Process in which, the physical appearance of the substance changes but not the chemical composition is known as physical change.  Some of the examples are melting, freezing, evaporation etc.

Process in which, the chemical composition of the substance changes is known as chemical change.  All chemical reactions are examples of chemical change because the composition changes.

Explanation of Solution

Water evaporating from lake does not change the chemical composition...

(b)

Interpretation Introduction

Interpretation:

Scabbing over of a skin cut has to be classified as a chemical or physical change.

Concept Introduction:

In matter, changes are familiar and common occurrences.  Similar to the properties of matter, changes in matter can also be classified as physical change and chemical change.

Process in which, the physical appearance of the substance changes but not the chemical composition is known as physical change.  Some of the examples are melting, freezing, evaporation etc.

Process in which, the chemical composition of the substance changes is known as chemical change.  All chemical reactions are examples of chemical change because the composition changes.

(c)

Interpretation Introduction

Interpretation:

A string is cut into two pieces has to be classified as a chemical or physical change.

Concept Introduction:

In matter, changes are familiar and common occurrences.  Similar to the properties of matter, changes in matter can also be classified as physical change and chemical change.

Process in which, the physical appearance of the substance changes but not the chemical composition is known as physical change.  Some of the examples are melting, freezing, evaporation etc.

Process in which, the chemical composition of the substance changes is known as chemical change.  All chemical reactions are examples of chemical change because the composition changes.

(d)

Interpretation Introduction

Interpretation:

Melting of some candle wax has to be classified as a chemical or physical change.

Concept Introduction:

In matter, changes are familiar and common occurrences.  Similar to the properties of matter, changes in matter can also be classified as physical change and chemical change.

Process in which, the physical appearance of the substance changes but not the chemical composition is known as physical change.  Some of the examples are melting, freezing, evaporation etc.

Process in which, the chemical composition of the substance changes is known as chemical change.  All chemical reactions are examples of chemical change because the composition changes.

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Chapter 1 Solutions

General, Organic, and Biological Chemistry
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