Sweating cools the body efficiently because water has a high
Correct answer: B. latent heat of vaporisation
- A. specific heat capacity
- B. latent heat of vaporisation
- C. surface tension
- D. density
Explanation
A large amount of energy is needed to break the hydrogen bonds holding liquid water together and convert it to vapour, and that energy is drawn from the skin, so a small volume of sweat removes a great deal of heat. High specific heat capacity is a different property, the one that lets a cell resist temperature change in the first place. Confusing the two is the usual error in this question.
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About Biological Importance of Water
Water supports life through its polarity, hydrogen bonding and ability to dissolve ionic and polar substances. Its high specific heat, heat of vaporization, cohesion, adhesion and incompressibility help regulate temperature, transport materials and maintain structure, while hydrolysis and osmosis depend directly on water.
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