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School Physics Quiz : Change of State & Latent Heat


Answer the following questions based on the change of state and latent heat.

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Multiple choice

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1.

If the specific latent heat of vaporization for water is 2.25 kJ/g, then the amount of heat required to vaporize 20 g of boiling water to steam at 100oC is

  45 J

  450 J

  4500 J

  45000 J

  Half-n-half Clue
 

2.

The amount of heat required to change a unit mass of a solid into a liquid, without changing its temperature, is referred to as the specific latent heat of _______.

  vaporization

  fission

  fusion

  Half-n-half Clue
 

3.

Hail is formed due to a change of state from vapour to solid.

  True

  False

 

4.

The heat gained or lost by a body during a change of state is referred to as _______ heat since there is no change in temperature.

  latent

  sensible

  specific

  Half-n-half Clue
 

5.

The boiling point of salt water is less than 100oC.

  True

  False

 

6.

The process by which a _______ changes into its gaseous state at a certain fixed temperature by the absorption of heat is called vaporization.

  liquid

  solid

 

7.

The amount of heat required to change a unit mass of a liquid into a gas, without changing its temperature, is referred to as the specific latent heat of _______.

  fission

  vaporization

  fusion

  Half-n-half Clue
 


 
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