CHM152GW1 S09 Key

Chemistry (MasteringChemistry Series)

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Unformatted text preview: CHM 152, Group Work 1, Spring 2009, Burk, Names: ___________________________________ due 2 ‐ 3 ‐ 9 1. Write the rate equalities for this unbalanced reaction: CH 4 (g) + 2 O 2 (g) J CO 2 (g) + 2 H 2 O(g) െ ∆ሾܥܪ ସ ሿ ∆ݐ ൌ െ ∆ሾܱ ଶ ሿ 2∆ݐ ൌ ∆ሾܥܱ ଶ ሿ ∆ݐ ൌ ∆ሾܪ ଶ ܱሿ 2∆ݐ 2. Without any experimental data, write the rate law for the above reaction. ____ ܴܽݐ݁ ൌ ݇ሾܥܪ ସ ሿ ௠ ሾܱ ଶ ሿ ௡ ___ ____ 3. Calculate the average rate if initially the reactant concentration is 2.0M and after 10.0 seconds the reactant concentration is 0.50M. Show your work and circle your final answer. a. +0.15 M/s b. ‐ 0.15 M/s c. +6.7 M/s d. ‐ 6.7 M/s e. ‐ 15.0 M/s ܥ݄ܽ݊݃݁ ݅݊ ܥ݋݊ܿ݁݊ݐݎܽݐ݅݋݊ ܥ݄ܽ݊݃݁ ݅݊ ܶ݅݉݁ ൌ ܯ ௙ െ ܯ ௜ ܶ ௙ െ ܶ ௜ ൌ 0.50ܯ െ 2.0ܯ 10.0ݏ െ 0ݏ ൌ െ૙. ૚૞ ࡹ ࢙ 4. To graphically find the rate constant for a first order reaction you should plot ___ Ln[A] ________ versus __ t ____. 5. What percentage of a sample would remain after four half ‐ lives? _____ 6.25% ________ 6. According to the following unbalanced reaction, if the rate of appearance of oxygen gas is 4.00 x 10reaction, if the rate of appearance of oxygen gas is 4....
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CHM152GW1 S09 Key - CHM 152, Group Work 1, Spring 2009,...

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