Predict the Txy behavior for a mixture of ethanol (1) + 1-butanol (2) at 101.33 kPa using the Peng Robinson equation of state Compare the pre dictions to the experimental data given in Table P12-21. Is the Peng-Robinson equation of state a reasonable model for this system at this state? Please explain. 

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Η H II H=C=C-OH || Η Η Ethanol. Η Η Η Η H=C=C=C=C-OH ΙΙΙΙ Η Η Η Η 1-butanol