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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 the following processes are exothermic or endothermic. Is the sign on qsys positive or negative?

(a) the reaction of Na(s) and C12(g)

(b) cooling and condensing gaseous N2 to form liquid N2

(c) cooling a soft drink from 25 °C to 0 °C

(d) heating HgO(s) to form Hg(ℓ) and O2(g)

(a)

Interpretation Introduction

Interpretation:

The given reaction process is exothermic or endothermic has to be identified and sign of the qsys has to be indicated.

Concept Introduction:

When heat energy is transferred the directionality of heat transfer between the system and the surrounding is described either as endothermic or exothermic.

Explanation

Energy of the system decrease and energy of the surrounding increases, i.e.qsys<0,

During the reaction there is transfer of electrons from

(b)

Interpretation Introduction

Interpretation:

The given reaction process is exothermic or endothermic has to be identified and sign of the qsys has to be indicated.

Concept Introduction:

When heat energy is transferred the directionality of heat transfer between the system and the surrounding is described either as endothermic or exothermic.

(c)

Interpretation Introduction

Interpretation:

The given reaction process is exothermic or endothermic has to be identified and sign of the qsys has to be indicated.

Concept Introduction:

When heat energy is transferred the directionality of heat transfer between the system and the surrounding is described either as endothermic or exothermic.

(d)

Interpretation Introduction

Interpretation:

The given reaction process is exothermic or endothermic has to be identified and sign of the qsys has to be indicated.

Concept Introduction:

When heat energy is transferred the directionality of heat transfer between the system and the surrounding is described either as endothermic or exothermic.

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