Asked in Premeth Test 6 — Biological Molecules, Genetics, Transport and Digestion (8 March 2025) 2025

The amount of heat energy required to raise the temperature of one gram of water by 1°C :

Correct answer: D. Specific heat of water

  • A. Heat of neutralization of water
  • B. Heat of condensation of water
  • C. Heat of vaporization of water
  • D. Specific heat of water

Explanation

The specific heat of water is a measure of the amount of heat energy needed to raise the temperature of one gram of water by 1°C. Water has a high specific heat compared to many substances, allowing it to absorb and retain heat effectively. This property plays a crucial role in regulating environmental and biological temperatures. Therefore, the correct answer is the specific heat of water. The other options refer to different types of heat energy changes that are not related to simply raising the temperature of water by 1°C.

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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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