posted by amy .
i need help
while mercury is very useful in barometers, mercury vapor is toxic. given that mercury has Hvapp=56.9kj/mol and its normal boiling point is 356.7C calculate the vapor pressure mm Hg at room temperature, 25c
I believe you want to use the Clausius-Clapeyron equation.
What the problem doesn't tell you is that at the normal boiling point the vapor pressure of Hg is 760 mm Hg.