In this section of the Clausius Clapeyron equation we're going to take a look at its 2.4. Now we use this form of the equation when two temperatures and Oregon 2 pressures are mentioned. And we're going to say that we need to remember when given normal boiling point pressure equals 760 Tor or 760mm of mercury. This is known as our normal pressure.
Now with the two point of the Clausius Clapper on equation we now have
ln ( P 2 P 1 ) = − Δ H vape R ( 1 T 2 − 1 T 1 )Here we're going to say R is our gas constant. It's 8.314 Joules over moles times KP equals our vapor pressure. Again in tours or millimeters of mercury.
Delta H vape is our enthalpy of vaporization which is in joules per mole and the temperatures here have to be in units of Kelvin. So keep this in mind when we're talking about the classiest Clapper on equation and we're given two temperatures and Oregon 2 pressures, we have to use a two point form of the equation.