The vapor pressure of ethanol is 400 mmHg at 63.5°C.Its molar heat of vaporization is 39.3 kJ/mol.What is vapor pressure of ethanol, in mmHg, at 34.9°C?
A)0.0099 mmHg
B)4.61 mmHg
C)100 mmHg
D)200 mmHg
E)1,510 mmHg

Question

Quizplus · Accepted Answer

The Clausius-Clapeyron equation can be used to estimate the vapor pressure at a different temperature. Using the given values and solving the equation, the vapor pressure at 34.9°C is approximately 100 mmHg.

The Vapor Pressure of Ethanol Is 400 MmHg at 63