EBK FOUNDATIONS OF COLLEGE CHEMISTRY
EBK FOUNDATIONS OF COLLEGE CHEMISTRY
15th Edition
ISBN: 9781118930144
Author: Willard
Publisher: JOHN WILEY+SONS INC.
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Chapter 8, Problem 25PE

(a)

Interpretation Introduction

Interpretation:

The balanced equation for the decomposition reaction of solid mercury (II) oxide to give liquid mercury and oxygen upon absorbing 90.8kJ heat energy has to be written.

(b)

Interpretation Introduction

Interpretation:

The balanced equation for the reaction of hydrogen gas with oxygen gas to form liquid water with release of 285.8kJ heat energy has to be written.

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Write balanced equations for each of these reactions, including the heat term: Calcium metal reacts with water to produce calcium hydroxide and hydrogen gas, releasing 635.1 kJ of heat for every mole of calcium that reacts. Bromine trifluoride decomposes into bromine and fluorine upon absorption of 300.8 kJ of hear for each mole of bromine trifluoride decomposed.
Which observation is consistent with a chemical reaction occurring? Why?(a) Solid copper deposits on a piece of aluminum foil when the foil is placed in a blue copper nitrate solution. The blue color of the solution fades.(b) Liquid ethyl alcohol turns into a solid when placed in a low-temperature freezer.(c) A white precipitate forms when solutions of barium nitrate and sodium sulfate are mixed.(d) A mixture of sugar and water bubbles when yeasts are added. After several days, the sugar is gone and ethyl alcohol is found in the water.
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