boiling point of mixtures of ethanol and water

Boiling Point of Mixtures of Ethanol and Water

Group 18: Sanya Dhoundiyal, Jessica Chung and Erik Wolter

Ethanol

 What is the relationship of increasing the

proportion of water to ethanol on the boiling point of the resulting mixture?

Application

• Production of moonshine (distillation)• Safety when using alcohol in cooking

VariablesType of Variable

Ratio of moles of water to ethanol

Independent

Boiling Point Dependent

Pressure Control

Volume of the mixture Control

Independent VariableRatio of moles of water to moles of ethanol

Dependent VariableBoiling point of mixture (°C)

Controlled Variables• Pressure• Volume of ethanol and water• Uneven boiling

Materials

Procedure

Setting Up the Three Way Flask and Reflux Condenser

Results

Qualitative Data

Molar Ratios

Data Analysis

Conclusion

Evaluation

Heating

• Heating from pot uneven• Heating of mixture in three way flask

unevenSolution• Electric heater(school does not have one)

Impurities in Ethanol

• Not “pure• Impurities existed

in the Ethanol• Assumed that 5%

remaining in Ethanol was water

Solution• 99.6% ethanol

Density

• Densities were assumed to be that at STPSolution• Weigh the mass of added volumes

Uneven Boiling

• Whether the mixture is or is not homogenous

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