Question:
Vapour pressure 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 p_total p_chloroform and p_acetoneas a function of x_acetone. The experimental data observed for different compositions of mixture is
100 X xacetone 0 11.8 23.4 36.0 50.8 58.2 64.5 72.1 P_acetone /mm Hg 0 54.9 110.1 202.4 322.7 405.9 454.1 521.1 P_chloroform/mm Hg 632.8 548.1 469.4 359.7 257.7 193.6 161.2 120.7
Vapour pressure 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 p_total p_chloroform and p_acetoneas a function of x_acetone. The experimental data observed for different compositions of mixture is
| 100 X xacetone | 0 | 11.8 | 23.4 | 36.0 | 50.8 | 58.2 | 64.5 | 72.1 |
| P_acetone /mm Hg | 0 | 54.9 | 110.1 | 202.4 | 322.7 | 405.9 | 454.1 | 521.1 |
| P_chloroform/mm Hg | 632.8 | 548.1 | 469.4 | 359.7 | 257.7 | 193.6 | 161.2 | 120.7 |
Updated On: June 02, 2025
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Solution and Explanation
From the question, we have the following data
| 100 X xacetone | 0 | 11.8 | 23.4 | 36.0 | 50.8 | 58.2 | 64.5 | 72.1 |
| P_acetone /mm Hg | 0 | 54.9 | 110.1 | 202.4 | 322.7 | 405.9 | 454.1 | 521.1 |
| P_chloroform/mm Hg | 632.8 | 548.1 | 469.4 | 359.7 | 257.7 | 193.6 | 161.2 | 120.7 |
| P_tota(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 p_total of the solution curves downwards. Therefore, the solution shows negative deviation from the ideal behaviour.
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