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As a car's gas tank is filled, gasoline vapors in the tank are displaced and may be emitted to the atmosphere. The Reid vapor pressure (RVP) of gasoline represents the equilibrium vapor pressure of hydrocarbon vapors above fresh gasoline, measured at 100 °F (38 °C). Assume that the RVP = 7.8 psi (0.53 atm), gasoline ~ trimethylpentane (C8H17), and that the vapors are in equilibrium with liquid gasoline in the tank. Consider a warm, sunny day so that the gasoline vapor pressure is reasonably well represented by the RVP. Determine the amount of gasoline vapors expected to be release while refueling in g/gallon of gasoline pumped. Estimate the total nationwide emission rate for the USA by this mechanism in kg/day. Gasoline consumption in the USA in 2021 was about 134.83 x 10⁹ gallons. One estimate from the EPA is that 62 million kg/d are lost to evaporation. How do these numbers compare? Give some potential causes of any difference.

As a car's gas tank is filled, gasoline vapors in the tank are displaced and may be emitted to the atmosphere. The Reid vapor pressure (RVP) of gasoline represents the equilibrium vapor pressure of hydrocarbon vapors above fresh gasoline, measured at 100 °F (38 °C). Assume that the RVP = 7.8 psi (0.53 atm), gasoline ~ trimethylpentane (C8H17), and that the vapors are in equilibrium with liquid gasoline in the tank. Consider a warm, sunny day so that the gasoline vapor pressure is reasonably well represented by the RVP. Determine the amount of gasoline vapors expected to be release while refueling in g/gallon of gasoline pumped. Estimate the total nationwide emission rate for the USA by this mechanism in kg/day. Gasoline consumption in the USA in 2021 was about 134.83 x 10⁹ gallons. One estimate from the EPA is that 62 million kg/d are lost to evaporation. How do these numbers compare? Give some potential causes of any difference.

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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5. As a car's gas tank is filled, gasoline vapors in the tank are displaced and may be emitted to the atmosphere. The Reid vapor pressure (RVP) of gasoline represents the equilibrium vapor pressure of hydrocarbon vapors above fresh gasoline, measured at 100 °F (38 °C). Assume that the RVP = 7.8 psi (0.53 atm), gasoline ~ trimethylpentane (C3H17), and that the vapors are in equilibrium with liquid gasoline in the tank. Consider a warm, sunny day so that the gasoline vapor pressure is reasonably well represented by the RVP. Determine the amount of gasoline vapors expected to be release while refueling in g/gallon of gasoline pumped. Estimate the total nationwide emission rate for the USA by this mechanism in kg/day. Gasoline consumption in the USA in 2021 was about 134.83 x 10⁹ gallons. One estimate from the EPA is that 62 million kg/d are lost to evaporation. How do these numbers compare? Give some potential causes of any difference.
Transcribed Image Text:5. As a car's gas tank is filled, gasoline vapors in the tank are displaced and may be emitted to the atmosphere. The Reid vapor pressure (RVP) of gasoline represents the equilibrium vapor pressure of hydrocarbon vapors above fresh gasoline, measured at 100 °F (38 °C). Assume that the RVP = 7.8 psi (0.53 atm), gasoline ~ trimethylpentane (C3H17), and that the vapors are in equilibrium with liquid gasoline in the tank. Consider a warm, sunny day so that the gasoline vapor pressure is reasonably well represented by the RVP. Determine the amount of gasoline vapors expected to be release while refueling in g/gallon of gasoline pumped. Estimate the total nationwide emission rate for the USA by this mechanism in kg/day. Gasoline consumption in the USA in 2021 was about 134.83 x 10⁹ gallons. One estimate from the EPA is that 62 million kg/d are lost to evaporation. How do these numbers compare? Give some potential causes of any difference.
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