The snow on the mountains does NOT melt all at once when it is heated by the sun because:

A. it becomes very hard
B. it reflects most of the heat from the sun
C. it has a low specific heat capacity
D. it has a high latent heat of fusion

¨       It has a high latent heat of fusion. Snow has a high latent heat of fusion, which means that it requires a large amount of heat to melt. As a result, when the sun heats up the snow, only the top layer begins to melt, and the rest of the snow remains frozen. This process continues until all the snow has melted. Additionally, the reflection of sunlight by snow may reduce the amount of energy absorbed by the snow and slow the melting process.

  1. Latent heat of fusion: is the amount of heat required to convert a solid substance into a liquid at its melting point without any change in temperature. During the process of fusion, the heat energy is used to break the intermolecular forces of attraction between the particles of the solid.
  2. Heat capacity: is the amount of heat energy required to raise the temperature of a substance by 1 degree Celsius or Kelvin. It is a measure of how much heat a substance can absorb before its temperature starts to rise.
  3. specific heat capacity: which is the amount of heat energy required to raise the temperature of one unit mass of a substance by 1 degree Celsius or Kelvin
  4. Latent heat of vaporization: which is the amount of heat energy required to convert a liquid substance into a gas at its boiling point without any change in temperature.



Submitted by :- Jamil Ahmed

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