Milk will sour in about eight hours at 21c 70f room, Ask an Expert

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The activation energy for the reaction involved in the souring of raw milk is 75 kJ. Milk will sour in about eight hours at 21*C (70*F = room temperature). How long will raw milk last in a refrigerator maintained at 5*C? Assume the rate constant to be inversely related to souring time.

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