Practice Exam 2 - CHEM104F04 EXAM #2A NOVEMBER 11, 2004...

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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
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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
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Practice Exam 2 - CHEM104F04 EXAM #2A NOVEMBER 11, 2004...

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