The vapor pressure of the liquid hf is measured at different temperatures. the following vapor pressure data are obtained: temperature 270.6k and 287.5k, pressure 324.5 mmhg and 626.9 mmhg. calculate the enthapy of vaporization ( delta h vap ) in kj/mol for this liquid.

Enthalpy is 44.95 kJ/mol

Solution:

As per the question:

Temperature, T = 270.6 K

Temperature, T' = 287.5 K

Pressure, P = 324.5 mmHg

Pressure, P' = 626.9 mmHg

Now,

To calculate the enthalpy, we make use of the Clausius-Clapeyron eqn:

where

R = Rydberg's constant

Substituting suitable values in the above eqn:

the simple machine has three main features. they are:

fulcrum is the center point or pivot point of the machine. effort is input force/ applied force. load is external force/ output.

the keisha 's machine labels are

x : load

y: fulcrum

z: lever