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By how much are the fuel values different? Give the magnitude of the difference (the absolute value)

By how much are the fuel values different? Give the magnitude of the difference (the absolute value)

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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By how much are the fuel values different? Give the magnitude of the difference (the absolute value)

Bottled straight-chain alkanes can be used as fuels, including heptane and octane. | Property | Heptane | Octane | |------------------------------|---------------|--------------| | ΔH°<sub>comb</sub> (kJ/mol) | -4871.0 | -5430.0 | | Liquid Density (g/mL) | 0.655 | 0.703 | This table presents the combustion enthalpy and liquid densities of heptane and octane, which are both straight-chain alkanes. The combustion enthalpy (ΔH°<sub>comb</sub>) is shown in kilojoules per mole (kJ/mol) and indicates the energy released during combustion. Octane releases more energy than heptane with a value of -5430.0 kJ/mol compared to -4871.0 kJ/mol. The liquid density of octane is higher at 0.703 g/mL compared to heptane's 0.655 g/mL, suggesting that octane is denser than heptane.
Transcribed Image Text:Bottled straight-chain alkanes can be used as fuels, including heptane and octane. | Property | Heptane | Octane | |------------------------------|---------------|--------------| | ΔH°<sub>comb</sub> (kJ/mol) | -4871.0 | -5430.0 | | Liquid Density (g/mL) | 0.655 | 0.703 | This table presents the combustion enthalpy and liquid densities of heptane and octane, which are both straight-chain alkanes. The combustion enthalpy (ΔH°<sub>comb</sub>) is shown in kilojoules per mole (kJ/mol) and indicates the energy released during combustion. Octane releases more energy than heptane with a value of -5430.0 kJ/mol compared to -4871.0 kJ/mol. The liquid density of octane is higher at 0.703 g/mL compared to heptane's 0.655 g/mL, suggesting that octane is denser than heptane.
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