A large tank filled with a mixture of methane and air at 102 kPa and 25 ⁰C is connected to another large tank filled with a different composition of methane and air also at 102 kPa and 25 ⁰C. The connection between the tanks is a tube with an inner diameter of 50 mm and length of 150 mm. The concentration of methane in one tank is 90 mole percent and in the other, 5 mole percent. DETERMINE: molecular diffusion of methane (kmol/m² – s) CHOICES: 1.0269 x 10⁻⁵ 1.0338 x 10⁻⁴ 1.1671 x 10⁻⁵ 1.1749 x 10⁻⁵

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