From the plot of vapor pressure as a function of temperature shown below,the normal boiling point for tert-butyl alcohol is approximately
A)0°C.
B)40°C.
C)85°C.
D)100°C.

Question

From the plot of vapor pressure as a function of temperature shown below,the normal boiling point for tert-butyl alcohol is approximately 
A)0°C. 
B)40°C. 
C)85°C. 
D)100°C.

Quizplus · Accepted Answer

The normal boiling point of a substance is the temperature at which its vapor pressure equals 1 atm, which is commonly used as a reference point for boiling point measurements. From the plot, we can see that the vapor pressure of tert-butyl alcohol reaches 1 atm at approximately 85°C. Therefore, the correct choice is C.

From the Plot of Vapor Pressure as a Function of Temperature