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Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692

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BuyFindarrow_forward

Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 14, Problem 16E
Textbook Problem
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Give a thermodynamic argument for why it is more efficient to generate electricity from methane oxidation in a fuel cell rather than from methane oxidation in a conventional combustion power plant.

Interpretation Introduction

Interpretation:

The generation of electricity by the oxidation of methane in the fuel cells is more efficient than that by methane oxidation in a conventional power plant is to be discussed.

Concept Introduction:

Oxidation is the addition of an electronegative element or the removal of an electropositive element in a chemical reaction.

Reduction is the addition of an electropositive element or the removal of an electronegative element in a chemical reaction.

A chemical reaction in which oxidation process and reduction process take place simultaneously is called a redox reaction.

An oxidizing agent is a substance that has the capacity to oxidize other substances and get reduced in a chemical reaction.

A reducing agent is a substance that has the capacity to reduce other substances and get oxidized in a chemical reaction.

The hydrogen-oxygen fuel cell is a device that generates electricity by the chemical reaction between a source fuel and an oxidant.

In a fuel cell, the chemical energy is directly converted into electricity by the oxidation of methane.

In conventional power plants where methane is used as a fuel, the electricity is generated by the oxidation of methane.

The three steps involved in the production of electricity are as:

chemicalenergy1heat energy2mechanical energy3electrical energy

Explanation of Solution

Molten carbonate fuel cells use potassium carbonate as an electron transfer medium and methane as the fuel. The methane gas is treated with water in order to form carbon dioxide and hydrogen gas. The oxidation of methane in a fuel cell produces electricity. The efficiency of the fuel is associated with thermodynamics.

In a fuel cell, chemical energy is directly converted to electricity without the involvement of intermediate steps in the electrochemical reaction. During these energy conversions, no heat is lost. The generation of electricity in the conventional combustion of fuels involves three steps...

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Chapter 14 Solutions

Chemistry In Focus
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Ch. 14 - Can an oxidation reaction occur without a...Ch. 14 - Why is carbon oxidized in the following reaction...Ch. 14 - Why is bromine reduced in the following reaction...Ch. 14 - What is an oxidizing agent? A reducing agent?Ch. 14 - Name some common oxidizing and reducing agents,...Ch. 14 - Write equations for respiration and...Ch. 14 - Explain how an electrochemical cell works. Include...Ch. 14 - Use chemical equations to explain how an...Ch. 14 - Use chemical equations to describe a Leclanch dry...Ch. 14 - What is a fuel cell? How is it different from a...Ch. 14 - Give a thermodynamic argument for why it is more...Ch. 14 - Use chemical equations to explain how the...Ch. 14 - Use chemical equations to explain how the molten...Ch. 14 - Explain with the help of chemical equations why...Ch. 14 - Explain how each of the following helps prevent...Ch. 14 - How might aging and oxidation be related?Ch. 14 - What are free radicals, and how might they affect...Ch. 14 - What are the chemical similarities among the...Ch. 14 - What are the chemical similarities among the...Ch. 14 - Draw Lewis structures for each chemical reaction,...Ch. 14 - Draw Lewis structures for each chemical reaction,...Ch. 14 - For each reaction, indicate which elements are...Ch. 14 - For each reaction, indicate which elements are...Ch. 14 - For each reaction, indicate which elements are...Ch. 14 - For each reaction, indicate which elements are...Ch. 14 - For each reaction, identify the oxidizing agent...Ch. 14 - For each reaction, identify the oxidizing agent...Ch. 14 - Identify the oxidizing agent and the reducing...Ch. 14 - Identify the oxidizing agent and the reducing...Ch. 14 - Which would you expect to be a better oxidizing...Ch. 14 - Which would you expect to be a better reducing...Ch. 14 - Sum each of the following oxidation and reduction...Ch. 14 - Sum each of the following oxidation and reduction...Ch. 14 - A chemist attempts to protect two pieces of iron...Ch. 14 - A friend tells you that a health-related website...Ch. 14 - Which of the following factors might affect the...Ch. 14 - An engineer suggests using a plastic can instead...Ch. 14 - A molten carbonate fuel cell (MCFC) costs...Ch. 14 - Fossil fuel, nuclear, and hydroelectric power...Ch. 14 - The following diagram shows an electrochemical...Ch. 14 - The following diagram shows a molecular view of...

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