Why does the temperature of an athlete reduce when she perspires? (7) - Leaving Cert Physics - Question c - 2007
Question c
Why does the temperature of an athlete reduce when she perspires? (7)
Worked Solution & Example Answer:Why does the temperature of an athlete reduce when she perspires? (7) - Leaving Cert Physics - Question c - 2007
Step 1
Explain the role of perspiration
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Answer
During physical activity, an athlete generates excess heat within the body due to increased metabolic processes. To regulate body temperature, the body initiates perspiration, which involves the secretion of sweat.
Step 2
Describe the process of evaporation
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Answer
As sweat evaporates from the skin's surface, heat is absorbed from the body. This phase change occurs when water transitions from a liquid state to a vapor state, requiring energy, known as latent heat.
Step 3
Link heat loss to temperature reduction
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Answer
The energy (or heat) taken from the body during the process of evaporation leads to a reduction in the athlete's overall body temperature. Therefore, this cooling mechanism helps in maintaining homeostasis and preventing overheating during exertion.
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