Chemistry And a Lab Expriment

Laboratory Experiment 2 B:
estrus and engine cooling system Curves for a Pure Substance

Observations and Data:
| Cooling Process| Heating Process|
Time (min)| Temperature (C°)| Observations| Temperature (C°)| Observations|
0| 59| Liquid Paradichlorobenzene was vaporous| 20| Whitish material|
0.5| 55| | 28| |
1| 52| | 29| |
1.5| 51| The outside of the politic began to solidify| 46| |
2| 51| | 49| |
2.5| 51| | 50| |
3| 51| | 51| Small core of liquid formed|
3.5| 51| | 51| |
4| 51| | 51| |
4.5| 51| | 51| |
5| 51| | 51| |
5.5| 51| | 51| |
6| 51| | 51| |
6.5| 51| | 51| |
7| 51| | 51| |
7.5| 51| | 51| |
8| 51| | 51| |
8.5| 51| The outside of the liquid was solid; only a small portion inside remained liquid.| 51| More liquid formed; only small amount of solid left in the center of the test furnish|
9| 51| | 51| |
9.5| 51| | 51| |
10| 51| | 51| |
10.5| 51| | 51| |
11| 51| | 52| Solid completely melted and turned into downright liquid|
11.5| 51| | 54| |
12| 51| | 55| |
12.5| 50| The liquid completely solidified and turned into a whitish solid.



| 56| |
13| 48| | 57| |

Questions:

2. The freezing point of paradichlorobenzine is approximately 53.2 °C only my graph illustrates it as 51°C. (Note this is due to the different atmospherical pressures and concentration of paradichlorobenzine which causes many minor variation.)

3. The melting point of paradichlorobenzine is approximately 53.5 °C but my graph illustrates it at 51°C.( (Note this is due to the different atmospheric pressures and concentration of paradichlorobenzine which causes some minor variation.)

5. I can conclude that both the melting and boiling points of a pure warmheartedness are the (almost) the same. This is due to the fact that pure substances (unlike mixtures) have certain(prenominal) composition. And their components are...If you want to get a full essay, order it on our website: Orderessay



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