If heat is to be supplied continuously to a liquid at its boiling point, the temperature remains constant because:
AThe vapour pressure of the boiling liquid becomes greater than the external pressure
BExtra heat is spread in the air
CHigh energy molecules continuously leaving the surface of liquid
DThe forces of attractions become stronger
Correct answer
C. High energy molecules continuously leaving the surface of liquid
Explanation
High energy molecules continuously leaving the surface of liquid is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.