Usually when heat is transferred to a substance, the temperature of the substance increases. However, while a substance is melting or boiling, its
temperature does not change, even though heat is being transferred to it.
What is the scientific term used for the heat transferred in this situation?

You can still be friends with each other. you don't have to date since he likes someone else. just stick to being friends for now

You would be correct, boiling water does disinfect contamination.    the property of disinfecting means to kill  germs, bacteria and other pathogens or contamination  that might cause an infection or cause a person to become sickly. a couple methods of disinfecting are using soap, other cleaning supplies or by simply "boiling" the contaminate.  the reason why boiling water disinfects certain attributes is because some cells cannot survive the heat and pressure.

Ireally don’t know this