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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.

The heat gained or lost by a body during a change of state is the product of its _______ and the specific latent heat.

  Volume

  Weight

  Mass

  Half-n-half Clue
 

2.

In an experiment, a thin copper wire with weights at either end is placed on a supported block of ice. The thin wire is observed to pass through the ice. The experiment shows that an increase in _______.

  specific latent heat causes the freezing point of water to rise above 0o

  pressure causes the freezing point of water to rise above 0o

  specific latent heat causes the freezing point of water to drop below 0o

  pressure causes the freezing point of water to drop below 0o

  Half-n-half Clue
 

3.

The freezing point of salt water is less than 0oC.

  True

  False

 

4.

In an experiment, a thin copper wire with weights at either end is placed on a supported block of ice. The thin wire is observed to cut through the ice. The phenomenon where the ice above the wire refreezes is called _______.

  subtraction

  regeneration

  sublimation

  regelation

  Half-n-half Clue
 

5.

The process by which a liquid changes into its solid state at a certain fixed temperature by the _______ of heat is called solidification.

  absorption

  liberation

 

6.

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

  solid

  liquid

 

7.

If the specific latent heat of vaporization for water is 2.25 kJ/g, then the amount of heat required to vaporize 8 g of boiling water to steam at 100oC is

  18 J

  180 J

  1800 J

  18000 J

  Half-n-half Clue
 


 
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