The clear plastic bottles used for carbonated beverages (sometimes also called "soda," "pop," or "soda pop") are made from poly(ethylene terephthalate) (PET). The “fizz" in pop results from dissolved carbon dioxide (CO2); because PET is permeable to CO2, pop stored in PET bottles will eventually go “flat"
The clear plastic bottles used for carbonated beverages (sometimes also called "soda," "pop," or "soda pop") are made from poly(ethylene terephthalate) (PET). The “fizz" in pop results from dissolved carbon dioxide (CO2); because PET is permeable to CO2, pop stored in PET bottles will eventually go “flat"
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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Transcribed Image Text:The clear plastic bottles used for carbonated
beverages (sometimes also called
"soda," "pop," or "soda pop") are made from
poly(ethylene terephthalate)
(PET). The "fizz" in pop results from dissolved
carbon dioxide (CO2); because
PET is permeable to CO2, pop stored in PET bottles
will eventually go “flat"
(i.e., lose its fizz). A 20-oz. bottle of pop has a CO2
pressure of about 485 kPa
inside the bottle, and the CO2 pressure outside the
bottle is 0.6 kPa.
The Permeability Constant of the PET bottle is 0.23
x 10^-13 cm3@STP.cm/cm2.s.Pa. Note: assume that
each bottle has a surface area of 500 cm2 and a wall
thickness of 0.07 cm. If the bottle must lose 750
(cm3 STP) of CO2 before the pop tastes flat, what is
the shelf life in days for a bottle of pop?
Round your answer to 0 decimal places.
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