- is the slope of a plot of the natural log of the vapor pressure of a substance versus ________.
A)-1/T
B)-T
C)1/T
D)T
E)2T

Question

-  is the slope of a plot of the natural log of the vapor pressure of a substance versus ________.
A)-1/T 
B)-T 
C)1/T 
D)T 
E)2T

Quizplus · Accepted Answer

The slope of the natural log of the vapor pressure of a substance versus 1/T (where T is the temperature in Kelvin) is equal to -ΔHvap/R, where ΔHvap is the enthalpy of vaporization and R is the gas constant. Therefore, the slope is proportional to 1/T, making choice C the best option.

- Is the Slope of a Plot of the Natural