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What is the unit of coefficient of Diffusion coefficient?

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in Food Packaging Technology by (63.0k points)
What is the unit of coefficient of Diffusion coefficient?

(a) m^2/s

(b) cm^2/s

(c) m/s

(d) m^2s

The question was posed to me in an online interview.

This question is from Diffusivity and Permeability in Plastics topic in section Thermoplastic Polymers Properties & Processing of Food Packaging Technology

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Correct answer is (a) m^2/s

Explanation: The unit of coefficient of Diffusion coefficient is m^2/s. Diffusion coefficient is a measure of how fast a permeate moves through the plastic polymer. It depends on degree of crystallinity of polymer.

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