Freezing Point Depression

Freezing block Depression
Hollie Woods & Rebecca Thomas
Monday, May 24, 2010 
entropy and Observations:
Table 1: Data for Determining the Freezing compass point of Pure Cyclohexane (Part 1)
Time (minutes)| Temperature (°C)|
0| 22.1|
0.5|  20.5|
1|  15.3|
1.5|  11.0|
2|  9.5|
2.5|  8.7|
3|  8.3|
3.5|  8.0|
4|  8.0|
4.5|  7.9|
5|  7.9|
5.5|  7.8|
6|  7.8|
6.5|  7.7|
7|  7.6|
7.5| 7.6 |
8|  7.6|
8.5|  7.6|
9|  7.6|

9.5|  7.5|
10|  7.5|
10.5|  7.5|
11|  7.5|
11.5|  7.5|
12|  7.5|
12.5|  7.5|
13|  7.5|
13.5|  7.5|
14|  7.5|
14.5|  7.1|
15|  7.0|

Table 2: Data for Determining the Freezing stopover of Naphthalene/Cyclohexane Solution (Part 2)
Time (minutes)| Temperature (°C)|
0| 24.7 |
0.5|  22.5|
1|  19.7|
1.5|  16.2|
2|  14.6|
2.5|  13.5|
3|  13.4|
3.5|  11.2|
4|  11.1|
4.5|  8.9|
5|  7.5|
5.5|  6.5|
6|  5.9|
6.5|  5.0|
7|  4.5|
7.5|  4.0|
8|  3.4|
8.5|  3.0|
9|  3.0|
9.5|  2.8|
10|  2.0|
10.5|  2.7|
11|  2.1|

11.5| 2.0 |
12|  1.9|
12.5|  1.8|
13|  1.8|
13.5|  1.5|
14|  1.5|
14.5| 1.5 |
15| 1.



5 |

Table 3: Data for Determining the Freezing Point of Unknown/Cyclohexane Solution (Part 3)
Time (minutes)| Temperature (°C)|
0| 23.2 |
0.5| 16.5 |
1|  11.0|
1.5|  8.1|
2|  6.9|
2.5|  6.0|
3|  5.9|
3.5|  5.8|
4|  5.5|
4.5|  5.2|
5|  5.0|
5.5|  4.9|
6|  4.9|
6.5|  4.8|
7|  4.8|
7.5|  4.2|
8|  4.1|
8.5|  4.1|
9|  4.0|
9.5|  4.0|
10|  4.0|
10.5| 3.9 |
11| 3.8 |

11.5| 3.8 |
12|  3.7|
12.5|  3.6|
13|  3.6|
13.5|  3.5|
14|  3.5|
14.5|  3.5|
15|  3.5|

Calculations:
To calculate Freezing point depression surrounded by pure cyclohexane and the solution of cyclohexane and naphthalene: Temperature of pure solvent (freezing point) temperature of solution (freezing point). For fashion model: 8.0 2.0 =...If you want to get a full essay, order it on our website: Orderessay



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