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Ch.20 - Electrochemistry
Brown - Chemistry: The Central Science 15th Edition
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoBrown 15th EditionCh.20 - ElectrochemistryProblema 10b
Capitolo 20, Problema 10b

The electrodes in a silver oxide battery are silver oxide 1Ag2O2 and zinc (b) Which battery do you think has an energy density most similar to the silver oxide battery: a Li-ion battery, a nickel– cadmium battery, or a lead–acid battery? [Section 20.7]
Graph comparing energy densities of various batteries: Li-ion, NiMH, Nicad, and Lead acid.

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Step 1: Understand the concept of energy density, which is the amount of energy stored in a given system or region of space per unit volume or mass.
Step 2: Identify the energy density of the silver oxide battery. This information might be provided in your textbook or lecture notes.
Step 3: Analyze the graph provided, which compares the energy densities of various batteries: Li-ion, NiMH, Nicad, and Lead acid.
Step 4: Compare the energy density of the silver oxide battery with the energy densities of the batteries shown in the graph.
Step 5: Determine which battery (Li-ion, NiMH, Nicad, or Lead acid) has an energy density most similar to that of the silver oxide battery based on the graph.

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Energy Density

Energy density refers to the amount of energy stored in a given system or region of space per unit volume or mass. In batteries, it is a critical measure that indicates how much energy can be delivered relative to the battery's weight or size. Higher energy density means a battery can store more energy, making it more efficient for applications requiring compact power sources.
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Density Concepts

Battery Chemistry

Different types of batteries utilize various chemical reactions to store and release energy. For instance, silver oxide batteries use silver oxide and zinc, while lithium-ion batteries rely on lithium compounds. Understanding the chemistry behind each battery type helps in comparing their performance, including energy density, cycle life, and efficiency.
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Chemistry Gas Laws

Comparative Analysis of Batteries

Comparative analysis involves evaluating different battery types based on specific criteria such as energy density, cost, lifespan, and environmental impact. The graph provided illustrates the energy densities of various batteries, allowing for a visual comparison. This analysis is essential for determining which battery type is most suitable for specific applications, such as in consumer electronics or electric vehicles.
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Dimensional Analysis
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Magnesium, the element, is produced commercially by electrolysis from a molten salt (the 'electrolyte') using a cell similar to the one shown here. (b) Chlorine gas is evolved as voltage is applied in the cell. Knowing this, identify the electrolyte.

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Magnesium, the element, is produced commercially by electrolysis from a molten salt (the 'electrolyte') using a cell similar to the one shown here. (a) What is the most common oxidation number for Mg when it is part of a salt?

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Consider the following voltaic cell:

(c) What is the change in the cell voltage when the ion concentrations in the cathode half-cell are increased by a factor of 10?

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Bars of iron are put into each of the three beakers as shown here. In which beaker—A, B, or C—would you expect the iron to show the most corrosion ? [Section 20.8]

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