CHM 145 Experiment #1 Write-Up

CHM 145 Experiment #1 Write-Up - 1 Farley Boiling Point...

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1 Farley Boiling Point Elevation: Colligative Properties Conor Farley Alexandra CHM 145 A Sarah Nielsen 24 January 2012 1.) Temperature vs. Time Plot 2.) ΔT b vs. Molality Plot
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2 3.) Equations : y = (0.62 °C/mol/kg)*x + (0.68°C) Tb = fm Molality = Moles of solute/Kg. of Solvent 4.) Questions : 1. Immediately after the NaCl was added, the temperature of the solution decreased sharply. This may have happened because the number of particles in the solution increased when adding the solute (NaCl), which both decreased the vapor pressure, and increased the boiling point of said solution. The number of particles may have increased due to the decomposition of NaCl molecules in the water upon adding this solute to the solvent. The particles then filled the gaps between water molecules in the solution, which was accelerated by the addition of heat and the stirring rod, resulting in the solute dissolving. 2.
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CHM 145 Experiment #1 Write-Up - 1 Farley Boiling Point...

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