A vessel containing water is kept on a burner. The heat supplied by the burner raises the water temperature. The water starts boiling when its temperature reaches the boiling point. What happens if another water vessel is kept inside the first vessel? You observe something surprising.
Question: Select the correct option(s)
Answer: Options (B) and (D) are correct.
The water changes phase from liquid to gas through vaporization. It absorbs 'latent heat of vaporization' in this process. The water boils at 100 degree Celsius under atmospheric pressure.
The boiling water is at 100 degree Celsius. The water in a small bowl is also at 100 degree Celsius. The water in a small bowl is not boiling because it is not getting the necessary heat for evaporation. The temperature outside and inside the small boil is the same (100 degree Celsius). In the absence of temperature gradient (difference), heat can not be conducted through the material of the bowl.