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Chemistry & Chemical Reactivity

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

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Chapter
Section
BuyFindarrow_forward

Chemistry & Chemical Reactivity

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

Identify whether each of the following is a physical change or a chemical change: (a) melting butter, (b) burning wood, (c) dissolving sugar in water.

(a)

Interpretation Introduction

Interpretation:

Melting of butter has to be identified as physical or chemical change.

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 given process undergoes physical change because only th...

(b)

Interpretation Introduction

Interpretation:

Burning of wood has to be identified as physical or chemical change.

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:

Dissolving sugar in water has to be identified as physical or chemical change.

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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