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Consider a fuel cell that uses methane (“natural gas”) as

An Introduction to Thermal Physics | 1st Edition | ISBN: 9780201380279 | Authors: Daniel V. Schroeder ISBN: 9780201380279 40

Solution for problem 5P Chapter 5

An Introduction to Thermal Physics | 1st Edition

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An Introduction to Thermal Physics | 1st Edition | ISBN: 9780201380279 | Authors: Daniel V. Schroeder

An Introduction to Thermal Physics | 1st Edition

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Problem 5P Problem 5P

Consider a fuel cell that uses methane (“natural gas”) as fuel. The reaction is

CH4 + 2O2 → 2H2O + CO2

(a) Use the data at the back of this book to determine the values of ΔH and ΔG for this reaction, for one mole of methane. Assume that the reaction takes place at room temperature and atmospheric pressure.

(b) Assuming ideal performance, how much electrical work can you get out of the cell, for each mole of methane fuel?

(c) How much waste heat is produced, for each mole of methane fuel?

(d) The steps of this reaction are

at – electrode: CH4 + 2H2O → CO2 + 8H+ + 8e–;

at + electrode: 2O2 + 8H+ + 8e– → 4H2O.

What is the voltage of the cell?

Step-by-Step Solution:
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Section 4: Genetic and Molecular Biology Chapter 11 (Notes) Sexual reproduction and meiosis  Meiosis • Meiosis: type of nuclear division which results in half as many chromosomes as the parent cell (Reduction division). ◊ Leads to formation of eggs and sperm (gametogenesis) • Fertilization: process when sperm and egg unite sperm and egg ◊ Leads to offspring that are genetically distinct from each other and from their parents ◊ Each cell produced by meiosis receives a different gene combination • Genes are located on chromosomes ◊ Mistakes during meiosis result in cells containing the wrong number of chromosomes  Chromosomes and autosomes • Karyotype: number and types pf chromosomes present in an organism (basically a picture of someone’s chromosomes) • Sex chromosomes: The 23 chromosome which determine the sex of the individual. (1 pair) ◊ All other chromosomes are autosomes (22 pairs) • Humans have 46 chromosomes in every cell except their gametes • Chromosomes carry genes ◊ Gene: a section of DNA that influences one or more hereditary traits in an individual • Different types of genes are called alleles EXAMPE: Eye shape (gene) Narrow or round eyes (alleles)  Homologous chromosomes • Homologous chromosomes: Chromosomes of the same type (also called homologs) ◊ Homologs carry the same genes in the same locations but each one may contain different alleles.  Concept of ploidy • Ploidy: number of each type of chromosome present (n, 2n, 3n, etc.) ◊ Haploid (n): Organism whose cells contain just one of each type of chromosomes (ex: gametes) ◊ Diploid (2n): organisms whose cells contain two versions of each type of chromosome (one paternal chromosome and one maternal chromosome) ◊ Polypoid (3n,4n, etc..): Organisms with three or more versions of each type of chromosomes

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Textbook: An Introduction to Thermal Physics
Edition: 1
Author: Daniel V. Schroeder
ISBN: 9780201380279

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Consider a fuel cell that uses methane (“natural gas”) as