Gasoline is a complex mixture of hydrocarbons, including different isomers of octane. Gasoline is sold with a variety of octane ratings that are based on the comparison of the gasoline with the combustion properties of isooctane, a structural isomer of C8H18. The structure of isooctane and another isomer of C8H18 are shown in the figure below, along with their normal boiling points and heats of vaporization. Determine the vapor pressure of each isomer on a very hot summer day, 38.0 °C.
Gasoline is a complex mixture of hydrocarbons, including different isomers of octane. Gasoline is sold with a variety of octane ratings that are based on the comparison of the gasoline with the combustion properties of isooctane, a structural isomer of C8H18. The structure of isooctane and another isomer of C8H18 are shown in the figure below, along with their normal boiling points and heats of vaporization. Determine the vapor pressure of each isomer on a very hot summer day, 38.0 °C.
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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Gasoline is a complex mixture of hydrocarbons, including different isomers of octane. Gasoline is sold with a variety of octane ratings that are based on the comparison of the gasoline with the combustion properties of isooctane, a structural isomer of C8H18. The structure of isooctane and another isomer of C8H18 are shown in the figure below, along with their normal boiling points and heats of vaporization. Determine the vapor pressure of each isomer on a very hot summer day, 38.0 °C.
| Isooctane | Tetramethylbutane |
| bp = 98.2°C | bp = 106.5°C |
| ΔHvap = 35.8 kJ/mol | ΔHvap= 43.3 kJ/mol |
1 atm = 760 torr
For isooctane:
For tetramethylbutane: torr
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