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Under hypobaric storage, when gas is in equilibrium with its surroundings, the diffusivity _____ and concentration gradient _____

(a) Increase by ten folds, decreases to one-tenth

(b) Decreases to one-tenth, increase by ten folds

(c) Stays constant, stays constant

(d) None of the mentioned

The question was asked in final exam.

This key question is from Principles of Refrigerated Gas Storage of Foods-2 topic in division Food Preservation, Principles of Fresh Food Storage,  Principles of Refrigerated Gas Storage of Foods and Principles of Food Freezing of Food Engineering

1 Answer

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Best answer
The correct choice is (a) Increase by ten folds, decreases to one-tenth

Easy explanation: Under hypobaric storage, when gas is in equilibrium with its surroundings, the diffusivity increase by ten folds and concentration gradient decreases to one-tenth. This is because the concentration difference reduces to a large extent and hence the gradient decreases but since a new equilibrium is established and this always happens, the diffusivity increase.

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