Chem 210 Exam 3 Fall 2009

Chem 210 Exam 3 Fall 2009 - Chemistry 210 Exam 3 Fall 2009...

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Exam 3 Fall 2009 Name: Section: FREE RESPONSE: Answer the following questions in the spaces provided. Show all work and express final answers with the correct number of significant figures and units to receive full credit. If you use exponential notation for your answer, you must use proper scientific notation. Note: If a solution requires determination of a limiting reagent, you must in some way indicate you have determined what the limiting reagent is. 1. (4 points) Write a reaction for which the Δ H rxn = Δ formation for NH 4 Cl (s) . Include states for all species. 2. (8 points) Consider the reaction: 2 CO 2(g) 2 CO (g) + O 2(g) A) Calculate Δ H for the reaction above given the equations below with the enthalpies indicated: 2 CO (g) 2 C (s) + O 2(g) Δ H = 218 kJ CO 2(g) C (s) + O 2(g) Δ H = 393 kJ B) Draw an energy diagram that illustrates the relationships of the Δ H values for each of above reaction steps and the overall reaction. Δ
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This note was uploaded on 09/19/2011 for the course CHEM 51423 taught by Professor Martinovic during the Spring '10 term at Skyline College.

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Chem 210 Exam 3 Fall 2009 - Chemistry 210 Exam 3 Fall 2009...

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