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# f06_HW7_assign - CHM4411 Week 7 HW Sample Problems for...

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CHM4411 Week 7 HW & Sample Problems for EXAM #2 Problem #1 A particular pure liquid has a normal boiling point of 27 o C. At what temperature does this liquid have a vapor pressure of 1.85 atm? State all assumptions made. Problem #2 An ideal mixture of two volatile liquids is mixed at 298 K to a total composition of X 1 = X 2 = 0.5 , where X i represents the mole fraction of component i. The vapor pressure of pure liquid 1 is 0.0100 atm and the vapor pressure of pure component 2 is 0.1000 atm at 298 K. a) At what pressure does the mixture boil at 298 K? b) What is the composition of the vapor when the mixture just begins to boil at 298K as the pressure is reduced to that in part a)? {Give the mole fraction in the vapor of component 1} Problem #3 Consider the following thermodynamic data at 298 K and 1.000 atm pressure: Δ G f o [Br 2 (gas) ] = 3.110 kJ/mol Δ G f o [Br (gas) ] = 82.396 kJ/mol Δ H f o [Br 2 (gas) )] = 30.907 kJ/mol Δ H f o [Br (gas) ] = 111.88 kJ/mol (A Note on Percent Dissociation: If 1.00 mole of Br 2 (gas) is introduced into a reactor and 0.500 mole of this gas dissociates into 1.00 mole of Br Atoms, the percent dissociation is

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f06_HW7_assign - CHM4411 Week 7 HW Sample Problems for...

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