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.

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.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.16P

See similar textbooks

Similar questions

An extruder has barrel diameter and length of 150 mm and 3.1 m, respectively. The screw rotational speed = 55 rev/min, channel depth = 8 mm, and flight angle = 18°. The plastic melt has a shear viscosity = 175 Pa-s. Determine: (a) the extruder characteristic, (b) the shape factor Ks for a circular die opening with diameter = 4.0 mm and length = 15 mm, and (c) the operating point (Q and p).
What sort of material is this? What are the viscosity and spring constant of the material? What is the time threshold that determines whether the material acts as a liquid or solid? What is the characteristic frequency of the material? What real world material property does this model describe?
Calculate the young’s modulus from one of these two graphs?
A ceramic with KIc = 4 MPa m1/2 contains pores with radius a = 5 µm due to incomplete sintering. These pores lead to a decrease in the failure stress of the material in both tension and compression. One in every ten grainboundary junctions contains a void; the grain size of the ceramic is 50 µm. The ceramic fails in compression when the length ℓ of each crack generated at the voids equals one-half of the spacing between the voids. (a) Determine the compression strength of the ceramic, using the equation from Sammis and Ashby. (b) Determine the tensile strength of the ceramic, assuming flaws with size a.
Ram a farmer, managed to grow shaped-watermelons inside glass cases ofdifferent shapes. The shapes he used were: a perfect cube, hemi-spherical, cuboid,cylindrical along with the normal spherical shaped watermelons. Thickness of the skinwas same for all the shapes. Each of the glass cases was so designed that the totalvolume and the weight of the all the water-melons would be equal irrespective of theshape. A customer wants to buy water-melon for making juice, for which the skin of the water-melon has to be peeled off, and therefore is a waste. Which shape should the customer buy?
Calculate the heat capacity of liquid water per molecule, in terms of k. Suppose (incorrectly) that all the thermal energy of water is stored in quadratic degrees of freedom. How many degrees of freedom would each molecule have to have?
Alplas Plastics uses an extruder in which the barrel diameter = 0.4 m and length = 6.0 m. The extruder screw rotates at 65 rev/min; it has channel depth = 0.02 m and flight angle = 16°. The plastic melt has a shear viscosity = 85 Pa-s. Determine: (a) Qmax and pmax; (b) the shape factor Ks for a circular die opening in which Dd = 0.009 m and Ld = 0.03 m; and (c) the values of Q and p at the operating point
What are the strengths and weaknesses of this Visceoelastic model?
What kinds of properties might you expect molecular mechanics to be unable to calculate?
A clean and dry core rock sample weighing 425 g was 100%saturated with brine solution.The new weight is 453 g. The core sample is 12 cm long and 4 cm in diameter with a porosity of the rock sample is 0.173. Calculate the specific gravity to the brine which is used to measure the porosity
carbon tetrachloride at 20 degree celcius has a viscosity of .00097 kg/m.s. what shear stress required to deform this fluid at a strain rate of 5000 Hz?
With free body diagram please thank you. Clear and complete solution please. 2. Benzene at 20 deg * C has a viscosity of 0.000651 Pa-s. What shear stress is required to deform this fluid at a strain rate of 4900 s-¹?