Between points 3 and 4, energy is being used to heat water.
What is melting and boiling?
Melting and boiling are the physical phenomenon in which state of the matter changes.
- In the given diagram, at point 3 melting point temperature increases from 0°C to upwards as a result of which melting of ice takes place.
- At point 4, boiling point temperature increases from 100°C to upside so at this point vaporization of water takes place.
- Between these 2 point energy is used to heat water.
Hence, energy is used to heat water.
To know more about melting & boiling point, visit the below link:
https://brainly.com/question/40140
#SPJ2
