Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 12
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Vapour Pressure of Pure Acetone and Chloroform at 328 K Are 741.8 Mm Hg and 632.8 Mm Hg Respectively. - Chemistry

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 ptotalpchloroform’ and pacetone as a function of xacetone. The experimental data observed for different compositions of mixture is.

100 ×xacetone 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
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Solution

From the question, we have the following data

 

100 ×xacetone 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.

  Is there an error in this question or solution?
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APPEARS IN

NCERT Class 12 Chemistry Textbook
Chapter 2 Solutions
Q 37 | Page 62
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