quiz2ans-02 - 1 Name Student Number Chemistry 1000 A V...

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

View Full Document Right Arrow Icon
Name:_____________________________________________ Student Number_______________ Chemistry 1000 A, V Midterm Test #2 November 15, 2002 Calculators allowed. Make sure this test has 5 pages. Part A. Answer each question with a few sentences or equations where necessary. (5 Marks each) 1. What are the oxidation numbers of each atom in Fe(OH) 3 ? O -2 H +1 Fe +3 2. Why can SO 2 act as either an oxidant or a reducing agent? Sulfur can have oxidation states from +6 to -2. The sulfur atom has an oxidation state of +4 in SO 2 . Thus, the sulfur in SO 2 could be reduced or oxidized, and therefore can act as an oxidant or a reducing agent. 3. Cleaning up your house has a negative value of S, since disorder is reduced. Why does this activity increase the entropy of the Universe? The act of cleaning up your house involves the expenditure of energy, i.e. it is exothermic. This will cause the surroundings to warm, increasing the entropy of the surroundings, and therefore increasing the entropy of the Universe as well. 4. Consider two ways of going from nitrogen and oxygen to nitrogen dioxide: 1. ½ N 2(g) + O 2(g) . NO 2(g) 2. ½ N 2(g) + ½ O 2(g) . NO (g) followed by NO (g) + ½ O 2(g) . NO 2(g) Compare the two systems in terms of the overall H, S and G of reaction.
Image of page 1

Info iconThis 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