2.37 Vapour pressures of pure acetone and chloroform at 328 K are 741.8 mm Hg and 632.8 mm Hg respectively. Assuming that they form ideal solution over the entire range of composition, plot ptotal, pchloroform, and pacetone as a function of xacetone. The experimental data observed for different compositions of mixture is:
|
100Xacetone |
0 |
11.8 |
23.4 |
36.0 |
50.8 |
58.2 |
64.5 |
72.1 |
|
pacetone/mm Hg |
0 |
54.9 |
110.1 |
202.4 |
322.7 |
405.9 |
454.1 |
521.1 |
|
Pchloroform/mm Hg |
632.8 |
548.1 |
469.4 |
359.7 |
257.7 |
193.6 |
161.2 |
120.7 |
Plot this data also on the same graph paper. Indicate whether it has positive deviation or negative deviation from the ideal solution.
|
100Xacetone |
0 |
11.8 |
23.4 |
36.0 |
50.8 |
58.2 |
64.5 |
72.1 |
|
pacetone/mm Hg |
0 |
54.9 |
110.1 |
202.4 |
322.7 |
405.9 |
454.1 |
521.1 |
|
Pchloroform/mm Hg |
632.8 |
548.1 |
469.4 |
359.7 |
257.7 |
193.6 |
161.2 |
120.7 |
|
ptota (mm Hg) |
632.8 |
603.0 |
579.5 |
562.1 |
580.4 |
599.5 |
615.3 |
641.8 |
It can be observed from the graph that the plot for the ptotal of the solution curves downwards. Therefore, the solution shows negative deviation from the ideal behaviour.
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