14-2p591 - 14-2p591.wpd Page 1 of 1 Summary P591#6,7...

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14-2p591.wpd Page 1 of 1 Summary: P591 #6,7; P592 #1-4 P591 6) (s) 2(g) 3 8(g) a) 3C + 4H C H + energy 3 8(g) 2(g) 2(g) 2 (g) b) C H + 5O 3CO + 4H O + energy 22 c) More energy is released in the formation of the bonds in CO and H O than is needed to break 38 2 the bonds in C H and O . 7) 2 a) The formation of ethene is endothermic because it takes more energy to break the bonds in H 24 than is released in the formation of the bonds in C H . The combustion is exothermic because more energy is released in the formation of the bonds in CO and H O than is needed to break the 2 bonds in C H and O . (s) 2(g) 2 4(g) b) formation: 2C + 2H CH 2 4(g) 2(g) 2(g) 2 (g) combustion: C H + O CO + H O P592 1) a) endothermic / net energy is absorbed
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This note was uploaded on 04/09/2010 for the course SCIENCE CHEM taught by Professor M during the Spring '09 term at McMaster University.

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