We are asked to determine the H_{vap} for C_{6}F_{6}
We’re given a table of the vapor pressure at five different temperatures.
Temperature (K ) | Vapor Pressure (torr) |
280.0 | 32.42 |
300.0 | 92.47 |
320.0 | 225.1 |
330.0 | 334.4 |
340.0 | 482.9 |
For this problem, we can use the Clausius-Clapeyron Equation:
$\overline{){\mathbf{ln}}\left(\frac{{\mathbf{P}}_{\mathbf{2}}}{{\mathbf{P}}_{\mathbf{1}}}\right){\mathbf{}}{\mathbf{=}}{\mathbf{}}\frac{\mathbf{-}\mathbf{\u2206}{\mathbf{H}}_{\mathbf{vap}}}{\mathbf{R}}\left(\frac{\mathbf{1}}{{\mathbf{T}}_{\mathbf{2}}}\mathbf{-}\frac{\mathbf{1}}{{\mathbf{T}}_{\mathbf{1}}}\right)}$
where:
P_{1} = vapor pressure at T_{1}
P_{2} = vapor pressure at T_{2}
ΔH_{vap} = heat of vaporization (in J/mol)
R = gas constant (8.314 J/mol•K)
T_{1} and T_{2} = temperature (in K).
Temperature (K ) | Vapor Pressure (torr) |
280.0 | 32.42 |
300.0 | 92.47 |
320.0 | 225.1 |
330.0 | 334.4 |
340.0 | 482.9 |
By plotting these data in a suitable fashion, determine whether the Clausius-Clapeyron equation is obeyed. If it is obeyed, use your plot to determine H_{vap} for C_{6} F_{6}.
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Clausius-Clapeyron Equation concept. You can view video lessons to learn Clausius-Clapeyron Equation. Or if you need more Clausius-Clapeyron Equation practice, you can also practice Clausius-Clapeyron Equation practice problems.
What professor is this problem relevant for?
Based on our data, we think this problem is relevant for Professor Caldwell's class at UCONN.