Practice Exam 2 - CHEM104F04 EXAM#2A NAME_SECTION I(15 pts...

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

View Full Document Right Arrow Icon
CHEM104F04 EXAM #2A NOVEMBER 11, 2004 NAME________________________________________SECTION_______________________ I (15 pts ) Place the correct answer in the space at the left. ____________________________ 1. For a spontaneous reaction the value of S is always __________(1)___________. ____________________________ 2.The value of G o f of an element in its standard state always has a value of _________(2)_________. ____________________________ 3.. Kinetics is the study of the ________(3)________ and _________(4)___________ of a chemical reaction. ____________________________ 4. ____________________________ 5. A reaction that will proceed as written without outside intervention is called a ________(5)________ reaction. ____________________________ 6. According to the second law of thermodynamics the entropy of the universe is always ________(6)________> ____________________________ 7 . List three things that will affect the rate of a reaction. ____________________________ 8. ____________________________ 9. ____________________________ 10. A substance that increases the rate of the reaction but comes out of the reaction unchanged is called a _____(10)_______. ____________________________ 11. When the rate of the forward reaction equals the rate of the reverse reaction, the system is said to be at _______(11)_______. ____________________________ 12. When looking at a mechanism for a chemical reaction the slow step of the mechanism is called the ______(12)__. ____________________________ 13. When a reaction is found to be first order in reactant A and second order in reactant B, the overall order of the reaction is ________(13)________. ____________________________ 14. For a first order reaction, the units of the rate constant, k, are ___________(14)__________. ____________________________ 15. For what order of reaction does the half life get longer as the initial concentration increases?________(15)______. 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
CHEM104F04 EXAM #2A NOVEMBER 11, 2004 NAME________________________________________SECTION_______________________ II (6 pts) Nitric oxide react with hydrogen to form nitrous oxide and water. From the following data, determine the rate law for the reaction. i.e. determine x, y, and k Rate = k[NO] x [H 2 ] y 2 NO + H 2 N 2 O + H 2 O Ans. x = ________________ y = ________________ k = ________________ III (5 pts) A certain first order reaction A B, is 25 % complete in 42 seconds at 25 o C. What is the half life of the reaction?
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