One suggested treatment for a person who has suffered a stroke is to immerse the

Question

One suggested treatment for a person who has suffered a stroke is to immerse the patient in an ice-water bath at 0C to lower the body temperature, which prevents damage to the brain. In one set of tests, patients were cooled until their internal temperature reached 32.5 C. To treat a 69.7 kg patient, what is the minimum amount of ice (at 0C) that you need in the bath so that its temperature remains at 0C? The specific heat of the human body is 3480 J/(kgC), and recall that normal body temperature is 37.0 C.

Explanation / Answer

Use black principle

Q give = Q receive

Q (body) = Q (ice)

m * c * deltaT = m * L

69.7 * 3480 * (37 - 32.5) = m * 334000

m= 3.268 kg

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