answers study questions 1

answers study questions 1 - BIS2A. Spring 2009. Comai...

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BIS2A. Spring 2009. Comai Answers to study questions. Lecture 1 1. Consider each compound pair (look up the structure in wikipedia). Which one of the two has more energy on a molecule by molecule basis? Energy can be estimated by the bond type and number following the simple relation: C-H > C-O, O-H. Note that for each pair, R indicates the "rest of the molecule" and is the same. The under- lined compound has more energy pair compound 1 structure compound 2 structure a propane R-CH3 propanol R-CH2OH b propanol R-CH2OH propionic acid R-COOH c H2 H-H water H2O d methane CH4 carbon dioxide O=C=O e acetic acid R-COOH ethanol R-CH2OH 2. Next to each atom indicate the number of bonds that usually it forms when not charged atom bonds a H 1 b C 4 c O 2 d N 3 e P 5 3. Succintly explain why it would be difFcult to power a vehicle from water, even if water can be split to produce H2 gas, a highly energetic compound that makes an ideal fuel. The reaction 2 H-O-H --> 2 H2 + O2 requires a large amount of energy input. So you have to
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answers study questions 1 - BIS2A. Spring 2009. Comai...

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