Lecture 19 Chapter 9 and Chapter 10

Lecture 19 Chapter 9 and Chapter 10 - A. P > N...

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Chapter 9 continued Lecture 19 November 6, 2009
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Select the strongest bond of the following: (A) C—O (B) C—N (C) C=O (D) C—F (E) H—F
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Bond Bond Energy C—H 413 kJ/mol C==O 799 kJ/mol O==O 498 kJ/mol H—O 467 kJ/mol Calculate the value of H (in kJ) for the reaction CH 4 (g) + 2O 2 (g) CO 2 (g) + 2H 2 O (g) A. 1112 kJ of heat absorbed B. 818 kJ of heat absorbed C. 1112 kJ of heat evolved D. 818 kJ of heat evolved E. 382 kJ of heat evolved
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What is the energy liberated in this reaction? H 2 (g) + Cl 2 (g)→ 2HCl (g) Bond Energy (kJ/mol) H—H 431 H—Cl 427 Cl—Cl 239 (A) 496 kJ (B) 248 kJ (C) 923 kJ (D) 1529 kJ (E) 184 kJ
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Electronegativity
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Follow this link to view a “movie” on the electronegativity periodic trends:    http://wps.prenhall.com/wps/media/objects/603/617961/Electronegativity.html
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Which element will have the largest electronegativity value? (A) Kr (B) Br (C) Rb (D) I (E) As
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Arrange phosphorus, magnesium, nitrogen and potassium in order of decreasing electronegativity
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Unformatted text preview: A. P > N > Mg > K B. N > P > K > Mg C. P > N > K > Mg D. N > P > Mg > K E. None of these orders is correct. Select the least polar bond from the bonds listed below: A. SCl B. CCl C. OCl D. SiCl E. HCl In which of these substances are the atoms held together by polar covalent bonding? A. H 2 B. CuF 2 C. KBr D. SF 4 E. LiCl Metallic Bonding: electron sea model Chapter 10 Lewis Structures (octet rule) C N O F B A l G a In S i P S C l Ge As Se Br H Li B e Mg N a K C a When I converted this file, some of the element symbols were corrupted yes, there is no element aK (Check your periodic table to correct this.) Steps for determining Lewis Structures for molecules that contain atoms that obey the octet rule Step 1: Place atoms relative to each other Step 2: Determine the total number of valence electrons available...
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Lecture 19 Chapter 9 and Chapter 10 - A. P > N...

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