The volume of a given amount of water ______ when its temperature is increased from 0°C to 4°C.

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  1. remains the same
  2. decreases
  3. increases
  4. first increases and then decreases.

Answer (Detailed Solution Below)

Option 2 : decreases
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Detailed Solution

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Concept:

Density:

  • The density of a substance is its mass per unit volume.
  • It means that density is inversely proportional to volume. 
  • The SI unit of the density is kg/m3.

The graph between the specific volume and temperature of water:

  • The volume of a given amount of water decreases between 0°C to 4°C.
  • The volume starts to decrease when water is heated from 0°C because the heating causes the density of water to increase.

 

Explanation:

  • Though liquids expand on heating, water does not expand between 0°C to 4°C instead it contracts as water has maximum density at 4°C.
  • It expands above 4°C.
  • Hence, the volume of a given amount of water decreases when its temperature is increased from 0°C to 4°C.

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