Exam1Key - CH201-001 SSII 2009 Exam 1(exam code A Name Last...

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CH201-001 SSII 2009 Name:____________________________________ Exam 1 (exam code A) Last First Instructions: 1) Clearly write name on answer sheet 2) All work must be shown for full credit 3) There is a ± 1 digit tolerance for significant figures 4) Sign honor pledge and public grade statement 5) Be sure answers have proper sig figs, units, and are boxed A = ε l c R = 8.314 Jmol -1 K -1 H n N A = 6.02 x 10 23 mol -1 G = G o + RT ln Q G o = H o – T S o G ° = - RT(ln K eq ) H f o Table (in kJmol -1 ) Cl (g) + 121.7 CO 2 (g) - 393.51 Na (g) + 107.7 H 2 O (l) - 285.83 NaCl (s) - 411.1 H 2 O (g) - 241.82 N (g) + 472.7 O (g) + 249.1
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CH201-001 SSII 2009 Name:____________________________________ Exam 1 (exam code A) Last First 1. Calculate the molarity of a solution made by dissolving 23.4 g of Na 2 SO 4 in enough water to form a 125 mL solution. (6 points) [Na 2 SO 4 ] = ___1.32 M _______________ 2. In each of the following pairs of substances, circle the substance with the greater entropy: (8 points) 1 mol of H 2 (g) at 100 o C – OR – 1 mol H 2 (g) at 25 o C H 1 1.008 Li 3 6.941 Na 11 22.99 K 19 39.10 Rb 37 85.47 Cs 55 132.9 Fr 87 (223) 4 9.012 Mg 12 24.31 Ca 20 40.08 Sr 38 87.62 Ba 56 137.3 Ra 88 226 Sc 21 44.96 Y 39 88.91 La 57 138.9 Ac 89 227 Ti 22 47.87 Zr 40 91.22 Hf 72 178.5 Rf 104 261 V 23 50.94 Nb 41 92.91 Ta 73 180.9 Cr 24 52.00 Mo 42 95.94 W 74 183.8 Mn 25 54.94 Tc 43 98 Re 75 186.2 Fe 26 55.85 Ru 44 101.1 Os 76 190.2 Co 27 58.93 Rh 45 102.9 Ir 77 192.2 Ni 28 58.69 Pd 46 106.4 Pt 78 195.1
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Exam1Key - CH201-001 SSII 2009 Exam 1(exam code A Name Last...

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