Physics
During boiling or vaporization:
- all molecules take part
- temperature rises
- no heat is absorbed
- the average kinetic energy of molecules increases
Related Questions
In evaporation:
- all molecules of liquid begin to escape out
- only the molecules at the surface escape out
- the temperature of liquid rises by absorbing heat from surroundings
- the molecules get attracted within the liquid
The rate of evaporation of a liquid increases when:
- temperature of liquid falls
- liquid is poured in a vessel of less surface area
- air is blown above the surface of liquid
- humidity increases
The boiling point of a liquid is increased by:
- increasing the volume of liquid
- increasing the pressure on liquid
- adding ice to the liquid
- decreasing pressure on liquid
Two rods A and B of the same metal, but of length 1 m and 2 m respectively, are heated from 0°C to 100°C. Then:
- both the rods A and B elongate the same
- the rod A elongates more than the rod B
- the rod B elongates more than the rod A
- the rod A elongates, but the rod B contracts