eng-fall07-q8059x07b

eng-fall07-q8059x07b - CHEM 2045C Take-home quiz 7 NAME N...

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CHEM 2045C: Take-home quiz 7 NAME ___________________________ N #_____________ Show your work for full credit Eng Q8059x07b You are allowed to use books/notes/etc, but Due by the START of Monday’s (10/29/07) lecture. you are NOT allowed to receive help from others. Late quizzes will NOT be graded. As always, show your work, follow significant figure rules and box your answers for full credit. 1. (½ pt) What is Δ H f ° for solid gold? ____________________________________________ kJ/mol 2. (½ pt) Is ammonia more or less stable than N 2 and H 2 gas? ______________________________ N 2 (g) + 3 H 2 (g) 2 NH 3 (g) Δ H 1 ° = -91.8 kJ 3. (3 pts) Liquid hydrogen peroxide (H 2 O 2 ) exothermically decomposes to (liquid) water and oxygen gas. Determine the amount of energy (in kJ) released during the decomposition of 3.79 mL of hydrogen peroxide. The density of hydrogen peroxide is 1.40 g/mL. Hint: see problem 5.37.
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CHEM 2045C: Quiz 7 Eng Q8059x07b Show your work for full credit 4. (3 pts) Given the enthalpies of reaction below,
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This note was uploaded on 07/10/2011 for the course CHM 2045 taught by Professor Eng during the Fall '10 term at UNF.

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eng-fall07-q8059x07b - CHEM 2045C Take-home quiz 7 NAME N...

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