Physics for Scientists and Engineers: A Strategic Approach 5th Edition · Work, Heat, and the First Law of Thermodynamics · Problem 17
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Randall D. Knight — Work, Heat, and the First Law of Thermodynamics: Problem 17
One way you keep from overheating is by perspiring. Evaporation—a phase change—requires heat, and the heat energy is removed from your body. Evaporation is much like boiling, only water’s heat of vaporization at 35°C is a somewhat larger \(24 \times 10^5 \text{ J/kg}\) because at lower temperatures more energy is required to break the molecular bonds. Very strenuous activity can cause an adult human to produce 30 g of perspiration per minute. If all the perspiration evaporates, rather than dripping off, at what rate (in J/s) is it possible to exhaust heat by perspiring?
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주어진 조건: 35°C, 30 g
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Physics for Scientists and Engineers: A Strategic Approach · 5th Edition
저자: Randall D. Knight
출판사: Pearson
단원: Work, Heat, and the First Law of Thermodynamics