{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

summer 2006 exam2 practice

summer 2006 exam2 practice - Form B 1 NAME General...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Form B NAME: ______________________ SECTION:_____ General Chemistry 115 Exam 2 April 5, 2004 h = 6.63 x 10 -34 J . s 1 nm = 1 x 10 -9 m c = 3.00 x 10 8 m/s R H = 2.18 x 10 -18 s of H 2 O = 4.184 J/g C R = 0.0821 L . atm/ K . mol = 8.314 J/ K . mol 1 L . atm = 101.3 J 1 atm = 760 torr 1. A scientist studying the properties of hydrogen at low temperatures takes a 1.00 liter volume of hydrogen at 1.00 atm and a temperature of 25.00 degrees C and cools the gas at constant pressure to -200.00 degrees C. Predict the volume of the hydrogen after this process. a. 4.08 L b. 56.9 L c. - 0.800 L d. 0.844 L e. 1.33 x 10 7 L f. 9.33 x 10 -2 L g. 1.66 L h. 0.245 L 2. Concentrated nitric acid acts on copper to give nitrogen dioxide and dissolved copper ions, according to the following balanced equation. Cu (s) + 4HNO 3 (aq) 2 NO 2 (g) + Cu(NO 3 ) 2 (aq) + 2 H 2 O (l) If 13.3 grams copper is reacted with excess nitric acid at a constant the pressure of 1.10 atm and temperature of 25 degrees C, what was the work done on the surroundings by this process? Assume the copper metal and reacting nitric acid have negligible volume. a. - 18.3 J b. 26.6 J c. - 1.04 x 10 3 J d. 895 J e. - 1.88 x 10 6 J f. 13.8 J g. - 1.22 J h. - 2.99 x 10 -6 J 1 1
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Form B 3. Consider the following equation: NH 4 NO 3 (s) N 2 O (g) + 2H 2 O (g) Assume that NH 4 NO 3 (s) has negligible volume. Assume the reaction is carried out at constant temperature and an external pressure of one atmosphere. What is the sign of work? (negative or positive?)__________ Is the work done on the surroundings or on the system? _____________ If the reaction of one mole of NH 4 NO 3 (s) under these condition releases 36 kJ of heat, what is the sign of E? a. negative; on the surroundings; negative b. positive; on the surroundings; positive c. negative; by the surroundings; negative d. positive; by the surroundings; positive e.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern