Testing the
Clausius-Clapeyron Equation - A practical Approach
In this experiment, I aim to showcase the practical side of science, highlighting the interplay between theory and practice. In the Gas Equation section of the CHEMIX School Software, you can plot Clausius-Clapeyron pressure/boiling point curves and also calculate the boiling point at a given pressure (or vice versa). This tool enables a deeper understanding of how boiling points shift under varying pressure conditions, providing both theoretical calculations and practical demonstrations.
Comparing Theory and Practice
I conducted an experiment where I added 40°C water into a sample
vial and reduced the pressure to 0.08 atm. Using a modified bike
pump, I successfully demonstrated that water boils at this lower
pressure. This proved the theoretical calculation of water's
boiling point at low pressure, showing that the boiling point of
water at 0.08 atm is indeed around 40°C.
Fig. 1: The Pump Setup Without Water
The setup consisted of the DIY vacuum extractor (modified bike
pump), a pump hose, vacuum chamber, sample vial, and a check valve
between the hose and the sample vial to control pressure.
Fig. 2: How to Modify a Bike Pump for
Vacuum Creation
To carry out the experiment, I modified a standard bike pump so
that instead of creating pressure, it generated a vacuum.
Short Video 1: Testing the Modified Bike Pump’s
Vacuum Capabilities
Short Video 2: The Experiment – Boiling
Water at 40°C Under Low Pressure
In this video, I show that under low pressure, water boils at 40°C, demonstrating the practical aspect of the Clausius-Clapeyron relationship.
