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Matter in Our Surroundings — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceMatter in Our Surroundings2 Marks
Question
When water is cooled to a temperature x, it gets converted into ice at temperature x by a process called P. And when ice at temperature x is warmed, it gets reconverted into water at the same temperature x in a process called Q.
  1. What is the value of temperature x in Kelvin?
  2. What is the process P known as?
  3. What is the name of energy released during process P?
  4. What is the process Q known as?
  5. What is the name of energy absorbed during process Q?
✓

Answer

  1. 273K.
  2. The name of the process is freezing.
  3. Latent heat of freezing.
  4. Melting.
  5. Latent heat of fusion.

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