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vapour pressure of pure acetone and chloroform at...

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_acetone
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

Answer:

From the question, we have the following data

100 ×x_acetone	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_total(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_totalof the solution curves downwards. Therefore, the solution shows negative deviation from the ideal behaviour.

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