# Past Exam for CH 720 - Physical Chemistry I at Emporia State University (ESU)

## Exam Information

 Material Type: Exam 2 Professor: Staff Class: CH 720 - Physical Chemistry I Subject: Chemistry University: Emporia State University Term: Fall 1999 Keywords: Total VolumeBoiling PointAqueous Solution

## Sample Document Text

CH 720 NAME: Fall 1999 Exam #2 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 (CCl4) and 38.9 g of benzene (C6H6) at 25.0 0C. (10 points)          ∂ ∂     ∂ ∂= T 2 P vp V P T VT- C - C 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 (C6H12) is 81 0C. Given that ∆Hf [C6H12 (l)] = -154.4 KJ/mol and ∆Hf [C6H12 (g)] = -123.4 KJ/mol, determine the elevation of the boiling point of cyclohexane if 1.00 g of naphthalene (C10H8) was added to 500.0 g of cyclohexane. 5) The following data were obtained for an unknown solute in aqueous solution at 20.00C. Use this information to determine the molar mass of the solute a...