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The so-called hydrogen economy is based on hydrogen

Chemistry: Atoms First | 1st Edition | ISBN: 9780073511160 | Authors: Julia Burdge, Jason Overby ISBN: 9780073511160 60

Solution for problem 95AP Chapter 10

Chemistry: Atoms First | 1st Edition

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Chemistry: Atoms First | 1st Edition | ISBN: 9780073511160 | Authors: Julia Burdge, Jason Overby

Chemistry: Atoms First | 1st Edition

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Problem 95AP

The so-called hydrogen economy is based on hydrogen produced from water using solar energy. The gas is then burned as a fuel: A primary advantage of hydrogen as a fuel is that it is nonpolluting. A major disadvantage is that it is a gas and therefore is harder to store than liquids or solids. Calculate the number of moles of H2 required to produce an amount of energy equivalent to that produced by the combustion of a gallon of octane (C8H18). The density of octane is 2.66 kg/gal. and its standard enthalpy of formation is —249.9 kJ/mol.

Step-by-Step Solution:

Problem 95AP

The so-called hydrogen economy is based on hydrogen produced from water using solar energy. The gas is then burned as a fuel: A primary advantage of hydrogen as a fuel is that it is non polluting. A major disadvantage is that it is a gas and therefore is harder to store than liquids or solids. Calculate the number of moles of H2 required to produce an amount of energy equivalent to that produced by the combustion of a gallon of octane (C8H18). The density of octane is 2.66 kg/gal. and its standard enthalpy of formation is —249.9 kJ/mol.

                                                       Step by step solution

Step 1 of 3

Let’s calculate the energy produced by the one mole of octane.

The combustion reaction of octane is as follows.

                                                       

           

Let’s convert the energy from kJ/mol to kJ/gallon.

                       

                                 

Therefore, energy produced by the one mole of octane is  .

Step 2 of 3

Chapter 10, Problem 95AP is Solved
Step 3 of 3

Textbook: Chemistry: Atoms First
Edition: 1
Author: Julia Burdge, Jason Overby
ISBN: 9780073511160

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The so-called hydrogen economy is based on hydrogen