{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

ch+12+and+18+practice+questions

ch+12+and+18+practice+questions - Chem 1B W08 McKeachie...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chem 1B W08 - McKeachie Practice problems for ch 18 and 12 1. Assume four pennies are being tossed at the same time. Using entropy, determine the most likely combination of heads and tails which will result. 2. What is the sign of S for the following processes? a) Someone drops a stack of papers. b) Students come into a lecture hall and sit down for class. c) 2 NH 3 (g) 3 H 2 (g) + N 2 (g) d) Co(l) Co(s) e) Two solids, both at 0 K, are mixed together at 0 K. f) A sample of water is placed in the refrigerator. This water does not freeze. 3. Using S universe , determine if the synthesis of solid ammonium chloride (NH 4 Cl) from HCl gas and ammonia gas is spontaneous at 400.0 K. Depending on your result, determine a temperature at which the reaction is no longer spontaneous or becomes spontaneous as written. You may assume the enthalpy and entropy changes for the reaction do not depend on temperature. 4. Using G rxn , would the reaction of NO 2 (g) with itself to produce N 2 O 4 (g) be spontaneous at 570.0 K? Depending on your result, determine the temperature at which the reaction is no longer spontaneous or becomes spontaneous as written at these conditions. You may assume the enthalpy and entropy changes for the reaction do not depend on temperature.
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
Image of page 2
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