The article Permeability, Diffusion and Solubility of Gases (B. Flaconn`eche, et al.

Chapter 5, Problem 12

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The article “Permeability, Diffusion and Solubility of Gases” (B. Flaconn`eche, et al., Oil and Gas Science and Technology, 2001:262–278) reported on a study of  the effect of temperature and other factors on gas transport coefficients in semicrystalline polymers. The permeability coefficient \(\left(\text { in } 10^{-6} \mathrm{~cm}^{3}(S T P) / \mathrm{cm} \cdot \mathrm{s} \cdot M P a\right)\)  of \(C O_{2}\) was measured for extruded medium-density polyethylene at both \(60^{\circ} \mathrm{C} \text { and } 61^{\circ} \mathrm{C}\). The results are  as follows:

\(60^{\circ} \mathrm{C}\):   54 51 61 67 57 69 60 60 63 62

\(61^{\circ} \mathrm{C}\):   58 60 66 66 68 61 60

Find a 95% confidence interval for the difference in the permeability coefficent between \(60^{\circ} \mathrm{C}\) and \(61^{\circ} \mathrm{C}\).

Equation Transcription:

Text Transcription:

(in 10-6 cm3 (STP)/cmsMPa)

CO2

60°C and 61°C

60°C

61°C

60°C

61°C

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