Thermo Report Form

Thermo Report Form - Name Olivia Nixon Lab Day Time Tuesday 8am Partners Thermodynamics of the Solution Process This report is due at the beginning

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Name: Olivia Nixon Partners Thermodynamics of the Solution Process This report is due at the beginning of lab Week 8. DATA Mass of potassium nitrate 12 g Record your measurements in the second and fourth columns of the following table, then convert them to the corresponding values in the third and fifth columns. Solution Volume of KNO 3 ( aq ), mL Volume of KNO 3 ( aq ), L Crystallization Temperature, °C Crystallization Temperature, K 1 10.1 .0101 72.4 345.4 2 13.2 .0132 61.8 334.8 3 15.9 .0159 55.4 328.4 4 19.1 .0191 50.3 323.3 5 21.8 .0218 44.8 317.8 6 24.7 .0247 43.5 316.5 7 28.1 .0281 38.6 311.6 8 30.6 .0306 35.1 308.1 Calculate the number of moles of potassium nitrate in your sample; show your calculation below. 12.0 g KNO 3 * 1 mole KNO 3 / 101.1 g KNO 3 = .119 mole KNO 3 1. Make a spreadsheet in Excel to calculate the following quantities and then fill in the table below. Solution [K + ] [NO 3 - ] K SP ln K SP Crystallization Temperature (K) 1 T (K –1 ) (kJ mol –1 ) 1 5.89 5.89 34.69 3.55 345.4 .00290 -10.2 2 4.51 4.51 20.34 3.01 334.8 .00299 -8.38 3 3.74 3.74 13.99 2.64 328.4 .00305 -7.21 4 3.12 3.12 9.73 2.28 323.3 .00309 -6.13 5 2.73 2.73
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This note was uploaded on 12/05/2011 for the course CHEM 125 taught by Professor Retsek during the Winter '08 term at Cal Poly.

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Thermo Report Form - Name Olivia Nixon Lab Day Time Tuesday 8am Partners Thermodynamics of the Solution Process This report is due at the beginning

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