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The questions and instructions for exam 2 of physical chemistry i, fall 1999. The exam covers topics such as ideal mixtures, volumetric calculations, boiling points, and thermodynamics. Students are required to use given data and equations to determine various properties and make calculations.
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Fall 1999 Exam # 1) Show that : [15 points] 2) Through use of the figure below, determine the total volume of a solution that contains 42.3 g of carbon tetrachloride (CCl 4 ) and 38.9 g of benzene (C 6 H 6 ) at 25.0 0 C. (10 points)
T 2 P p v V
3) Assume the mixture in question 2) is an ideal mixture. Calculate Gmix, Hmix, and Smix. Is the ideal mixture assumption a good assumption in this case? Explain your answer. (10 points) 4) The boiling point of pure cyclohexane (C 6 H 12 ) is 81 0 C. Given that Hf [C 6 H 12 (l)] = -154.4 KJ/mol and Hf [C 6 H 12 (g)] = -123.4 KJ/mol, determine the elevation of the boiling point of cyclohexane if 1.00 g of naphthalene (C 10 H 8 ) was added to 500.0 g of cyclohexane.
7) Upon completion of Physical Chemistry I, the three of you decide to climb Mt. McKinley. After reaching the summit you determine the boiling point of pure water is 75^0 C. Given that Hvap(H 2 O(l)) is 40.66 kJ/mol, use the table below to estimate your elevation.
