Question
Show by an experiment that by increasing the temperature, the substance can be changed into liquid and then into vapours.

Answer

Take some ice cubes in a beaker and heat it by spirit lamp or Bunsen burner and put a thermometer in the beaker, when the temperature reaches to zero degree Celsius the temperature will not increase.
Till the whole amount of ice does not changes into its liquid state next heat it continuously and then when the temperature reaches hundred degree Celsius the temperature will not increase till the whole amount of water does not changes into its gaseous state as water vapours.

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