Options:
A.
B.
C.
D.
E.
Sign in to view the correct answer and detailed explanation.
Study with fewer interruptions on Android
Use Ulearngo on a verified device for smoother past-question study.
Ulearngo is an independent study app. It is not affiliated with, endorsed by, or representing Joint Admissions and Matriculation Board (JAMB). Always confirm official exam, admission, registration, syllabus, timetable, and result information from JAMB official website.
Earlier discussion
1 older comment kept for context.
Oluwaseun Adeyemi
*The boiling point of a liquid is the temperature at which its saturated vapour pressure equates the pressure of the external air around it.
*The normal boiling point of a liquid is the temperature at which its vapour pressure is equal to 1 atm.
Here are some differences between boiling point and normal boiling point:
*Sometimes, the pressure of the air surrounding the liquid being heated can be greater or less (eg the pressure in a vacuum is less than the atmospheric pressure) than the atmospheric pressure, so the temperature at which the vapour pressure of the liquid equals the pressure of the air around it is the BOILING POINT.
*But if the liquid is being heated under normal atmospheric pressure, then the temperature at which the vapour pressure of the liquid equals the atmospheric pressure (which was defined by IUPAC to be 1 atm or 760 torr, 760 mmHg, 101325 pascal, 101325 N/m2) is the NORMAL BOILING POINT of the liquid.