
To find:
Which has the higher fuel value, propanol or isopropanol?

Answer to Problem 19.90QA
Solution:
Propanol has the higher fuel value than isopropanol.
Explanation of Solution
1) Concept:
To calculate the fuel value of a compound, we need to use heat of combustion of fuel and molar mass. First we will write the combustion reaction of propanol and isopropanol. Then we will calculate the
2) Formula:
i)
ii)
3) Given:
i)
ii)
iii)
iv)
v)
vi)
vii)
4) Calculations:
Write the balanced combustion reaction of propanol.
Calculate the
If we divide the absolute value of
The fuel value of propanol is
Write the balanced combustion reaction of isopropanol.
Calculate the
If we divide the absolute value of
The fuel value of isopropanol is
The fuel value of propanol is higher than isopropanol.
Conclusion:
The fuel value is calculated from the thermodynamic data, combustion reaction, and molar mass.
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Chapter 19 Solutions
Chemistry: An Atoms-Focused Approach
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