Chemistry in Context
Chemistry in Context
8th Edition
ISBN: 9780073522975
Author: American Chemical Society
Publisher: McGraw-Hill Education
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Chapter 8.5, Problem 8.14CT

(a)

Interpretation Introduction

Interpretation:

How is a fuel cell differing from other batteries has to be described.

Concept introduction:

Electrochemical cell is a device capable of converting chemical energy into electrical energy or induces chemical energy by electrical energy. In the galvanic cell spontaneous redox reaction takes place. Redox reaction means the reaction in which the oxidation state of the atoms changes due to the occurrence of both reduction and its complementary oxidation reactions. The element under oxidation reaction loses electron whereas the element in the reduction gains electron.

Battery: It is a storage device used for the storage of chemical energy and for the transformation of chemical energy into electrical energy.

Rechargeable battery work because they use reaction are reversible, while non-rechargeable battery they use reactions are non-reversible.

(b)

Interpretation Introduction

Interpretation:

Wheather a PEM fuel cell can be rechargeable cell (or) not has to be explained.

Concept introduction:

PEM fuel cell: These cells work with a polymer electrolyte in the form of a thin permeable sheet and allow hydrogen protons to pass through but prohibit the passage of electrons and heavier gas.

Battery: It is a storage device used for the storage of chemical energy and for the transformation of chemical energy into electrical energy.

Rechargeable battery work because they use reaction are reversible, while non-rechargeable battery they use reactions are non-reversible.

(c)

Interpretation Introduction

Interpretation:

Why the combination of H2 and O2 in a fuel cell not classified as combustion has to be explained.

Concept introduction:

A Fuel is a substance that releases energy when it gets burnt in presence of Oxygen.  The phenomenon a substance getting burnt in presence of Oxygen is termed as combustion and it is exothermic process.  The larger the amount of heat released per gram of a substance, greater the potential it has to be a fuel.

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Chapter 8 Solutions

Chemistry in Context

Ch. 8.7 - Prob. 8.21CTCh. 8.8 - Prob. 8.23CTCh. 8 - Prob. 1QCh. 8 - Prob. 2QCh. 8 - Which chemical species gets oxidized and which...Ch. 8 - What is the difference between a galvanic cell and...Ch. 8 - Two common units associated with electricity are...Ch. 8 - Consider the galvanic cell pictured. A coating of...Ch. 8 - Prob. 7QCh. 8 - a. How does the voltage from a tiny AAA alkaline...Ch. 8 - Prob. 9QCh. 8 - The mercury battery has been used extensively in...Ch. 8 - Prob. 12QCh. 8 - During the conversion of O2(g) to H2O(l) in a fuel...Ch. 8 - How does the reaction between hydrogen and oxygen...Ch. 8 - This diagram represents the hydrogen fuel cell...Ch. 8 - What is a PEM fuel cell? How does it differ from...Ch. 8 - In addition to hydrogen, methane also has been...Ch. 8 - Prob. 18QCh. 8 - Potassium and lithium both are reactive Group 1...Ch. 8 - What challenges keep hydrogen fuel cells from...Ch. 8 - Every year, 5.6 1021 kJ of energy comes to Earth...Ch. 8 - Prob. 22QCh. 8 - Prob. 23QCh. 8 - Prob. 24QCh. 8 - Prob. 25QCh. 8 - Consider these three sources of light: a candle, a...Ch. 8 - Prob. 27QCh. 8 - What is the difference between an electrolytic...Ch. 8 - Provide some differences between a leadacid...Ch. 8 - Prob. 30QCh. 8 - The company ZPower is promoting its silverzinc...Ch. 8 - Prob. 32QCh. 8 - Prob. 33QCh. 8 - You never need to plug in Toyotas gasolinebattery...Ch. 8 - Prob. 35QCh. 8 - What is the tragedy of the commons? How does this...Ch. 8 - Hydrogen is considered an environmentally friendly...Ch. 8 - Fuel cells were invented in 1839 but never...Ch. 8 - Hydrogen and methane both can react with oxygen in...Ch. 8 - Engineers have developed a prototype fuel cell...Ch. 8 - How can the principles of green chemistry be...Ch. 8 - Prob. 42QCh. 8 - Prob. 43QCh. 8 - Small quantities of hydrogen gas can be prepared...Ch. 8 - Prob. 45QCh. 8 - Prob. 46QCh. 8 - Prob. 47QCh. 8 - Prob. 48QCh. 8 - Although Alessandro Volta is credited with the...Ch. 8 - Prob. 50QCh. 8 - If all of todays technology presently based on...Ch. 8 - Prob. 52QCh. 8 - Prob. 53QCh. 8 - Prob. 54QCh. 8 - Prob. 55Q
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