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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

In each case, decide if the change is a chemical or physical change.

(a) A cup of household bleach changes the color of your favorite T-shirt from purple to pink.

(b) Water vapor in your exhaled breath condenses in the air on a cold day.

(c) Plants use carbon dioxide from the air to make sugar.

(d) Butter melts when placed in the Sun.

(a)

Interpretation Introduction

Interpretation:

The given change has to be identified as physical or chemical property.

Concept introduction:

Physical change:

A change in which the substance retains in form or state without altering in composition.  It is temporary and easily reversible.

Chemical change:

A change in which the substance loses its identity and produces one or more new substances by change in its composition.  It is permanent and not easily reversible.

Explanation

The change in color of t shirt from purple to pink is physical change sin...

(b)

Interpretation Introduction

Interpretation:

The given change has to be identified as physical or chemical property.

Concept introduction:

Physical change:

A change in which the substance retains in form or state without altering in composition.  It is temporary and easily reversible.

Chemical change:

A change in which the substance loses its identity and produces one or more new substances by change in its composition.  It is permanent and not easily reversible.

(c)

Interpretation Introduction

Interpretation:

The given change has to be identified as physical or chemical property.

Concept introduction:

Physical change:

A change in which the substance retains in form or state without altering in composition.  It is temporary and easily reversible.

Chemical change:

A change in which the substance loses its identity and produces one or more new substances by change in its composition.  It is permanent and not easily reversible.

(d)

Interpretation Introduction

Interpretation:

The given change has to be identified as physical or chemical property.

Concept introduction:

Physical change:

A change in which the substance retains in form or state without altering in composition.  It is temporary and easily reversible.

Chemical change:

A change in which the substance loses its identity and produces one or more new substances by change in its composition.  It is permanent and not easily reversible.

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