Vapor Pressure of Liquids Determining Heat of Vaporization

In a sealed flask, evaporation and condensation continue at ____ rates

equal

Molecules _____ the liquid surface while vapor molecules return to the liquid

leave

P total =

P total = Pair + Pvapor

What was the point of the pressure sensor?

Used to measure the total pressure inside the flask

If the gas pressure didn’t stabilize, what did this indicate?

A leak

What is Patm?

Atmospheric pressure outside the flask

When is Patm measured

While the flask’s valve is open to room air

Define Pair

Pressure exerted by the air trapped inside the sealed flask

When inserting the syringe why did we have to draw back?

The system was being pressurized as we inject the liquid so drawing back is a must

Vapor pressure rises as temperature ____

Rises

Enthalpy is equal to

H = U + PV

Gibbs free energy is equal to?

∆G = H - T∆S

ln(p2/P1) = ?

ln (P2 / P1) = -(∆Hvap / R) × (1/T2 - 1/T1)

What is the equation we must remeber????

ln (P2 / P1) = -(∆Hvap / R) × (1/T2 - 1/T1)