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Question
During boiling or vaporization
Options
all molecules take part
temperature rises
no heat is absorbed
the average kinetic energy of molecules increases.
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Solution
all molecules take part
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RELATED QUESTIONS
Temperature of a liquid rises during boiling or vaporization
Boiling is a rapid phenomenon.
The molecules of liquid ............. heat from surroundings in evaporation.
Heat is ................... during boiling.
Cooling is produced in ....................
Match the column
| Column A | Column B |
| (a) Blowing air increases | (1) Increase in intermolecular separation |
| (b) Increase in pressure increases | (2) Pendulum of a clock |
| (c) Thermal expansion |
(3) Cooking utensils |
| (d) Invar | (4) Boiling point |
| (e) Pyrex glass | (5) Evaporation |
No heat is supplied to a liquid during evaporation. How does then the liquid change into its vapours?
Why is cooling produced when a liquid evaporates?
Give reason for the increase in the rate of evaporation of a liquid when temperature of liquid is increased.
Name two ways of change of liquid state to the vapour state and distinguish them.
