Lecture 2 - AtomicEnergiesandPeriodicity Lecture2

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Atomic Energies and Periodicity  - Lecture 2
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Atomic Energies and Periodicity -  Lecture 2 We are half-way through chapter 5 now. Are you?
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Group 1A Chemistry Outer (valence electrons) = ns 1 (n=period number) Chemistry comes from loss of this electron to another species
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2 Na + 2 H 2 O 2 Na + + 2 OH - + H 2 in fact, 2 Na 2 Na + + 2 e - and 2 H 2 O + 2 e - 2 OH - + H 2 e.g. Sodium + Water
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Group 1A chemistry. .. Hydrogen 1671 flammable gas observed 1766 hydrogen identified 1810 hydrogen identified in acids 1885 Balmer’s lines 1913 Bohr’s model of H atom 1926 Schrodinger’s wave model of H 1927 Quantum model first applied to H 2
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Production of hydrogen 1. “water gas reaction” C (s) + H 2 O (g) CO (g) + H 2(g) 2. methane reforming CH 4(g) + H 2 O (g) CO (g) + 3 H 2(g) (requires 1000 o C and a catalyst)
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3. catalytic reforming e.g. C 6 H 14 C 6 H 6 + 4 H 2 4. electrolysis 2 H 2 O (l) O 2(g) + 2 H 2(g) Production of hydrogen catalyst
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Reactions of Hydrogen 1. Making ammonia N 2 + 3 H 2 2 NH 3 2. Hydrogenation CH 3 (CH 2 ) 7 CH = CH(CH 2 ) 7 COOH (l) H 2 CH 3 (CH 2 ) 7 C H 2 C H 2 (CH 2 ) 7 COOH (s)
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3. making methanol CO (g) + 2 H 2(g) CH 3 OH (l)
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This note was uploaded on 11/08/2011 for the course CHEM 1001 taught by Professor Burk during the Fall '09 term at Carleton CA.

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Lecture 2 - AtomicEnergiesandPeriodicity Lecture2

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