Statement 1: When there is an equilibrium between the vapor pressure and the percentage relative humidity, water activity is directly proportional to the percentage relative humidity. Statement 2: Even a water activity as high as 0.85 for food items is considered to be very dry for substances.

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asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

Statement 1: When there is an equilibrium between the vapor pressure and the percentage relative humidity, water activity is directly proportional to the percentage relative humidity.

Statement 2: Even a water activity as high as 0.85 for food items is considered to be very dry for substances.

(a) True, False

(b) True, True

(c) False, False

(d) False, True

I had been asked this question in an international level competition.

This intriguing question originated from Principles of Semi-Moist Foods-2 in division Principles of Semi-Moist Foods, Principles of Food Preservation by Fermentation, Principles of Food Pickling and Curing and Principles of Food Storage Stability of Food Engineering

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