_ is the heat required to convert a gram of water into vapours at its boiling point.
Correct answer: A. Heat of vapourization
- A. Heat of vapourization
- B. Specific heat capacity
- C. Heat of ionization
- D. Polarity of water
Explanation
The heat of vaporization is the amount of heat energy required to convert a unit mass of a substance (in this case, water) from its liquid phase to its vapor phase at its boiling point. For water, the heat of vaporization is approximately 2250 kJ/kg or 540 cal/g.
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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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