The purpose of this experiment was to determine the pressure and temperature affect on specific solutions of ethanol and acetone, and how the intermolecular reactions that occur between the molecules affect the physical properties.  In order to do this, the heat of vaporization was determined along with the slope (change in pressure vs. temperature) of both solutions.  The ethanol and acetone solutions were heated in a flask at specific temperatures until boiling, then were capped with a rubber stopper to conceal the gas produced and prevent it from escaping.  The pressure of the gas collected was measured in the flask while the temperature cooled.  Data found clearly showed that Acetone had a lower heat of vaporization at 29,100 J/mol compared to the Ethanol at 44,406 J/mol, which demonstrates the weaker intermolecular interactions between the Acetone molecules.  During this experiment some human errors occurred which may have contributed to some skewed results and lack of sufficient data.  There was an error in the heat of vaporization due to the fact that there was not enough gas collected in the flask before sealing the flask completely with the rubber stopper.  In order to have prevented this from happening, the ethanol and acetone should have been boiled in the water bath for a longer period of time until it had completely reached boiling point before closing the air source off.  In the experiment, the Ethanol and Acetone failed to boil properly and the graph did not have a clear slope.  The theoretical slope was then used to discuss the effects.   Overall this experiment was clear and concise in its detailed layout and explanation, and was easy to conduct because of this.