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Calculate the diffusion constant of argon at 20°C and at the following pressures. Take σ =...

Calculate the diffusion constant of argon at 20°C and at the following pressures. Take σ = 0.36 nm2. If a pressure gradient of 1.0 bar·m−1 is established in a pipe, what is the flow of gas due to diffusion?

(a) 2.02 Pa (b) 202 kPa (c) 20.2 MPa

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