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Problem Set 2 2011

Problem Set 2 2011 - III The entropy of hydration becomes...

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CHM 241 Spring 2011 Problem Set 2 (Due Jan. 31) Text: All Exercises: 1.24e-f, 1.28; 11.5ii; 12.1, 12.3 A,B, D I. The Figure below shows the first ionization of a sequence of eight atoms from the Periodic Table, but not necessarily from the same row. If N, O and F all occur within the run, identify all elements involved. Explain your reasoning, and explain why the ionization energies of atoms X, Y and Z all appear as local minima in the overall sawtooth pattern. II. Why does the first ionization energy increase in the following order? Al < Ga < B
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Unformatted text preview: III. The entropy of hydration becomes more negative from Na + to Mg 2+ to Al 3+ though the coordination number is probably 6 in each case. Account for the trend in disorder. S ◦ 298 (J mol-1 K-1 ) : Na + (aq), 60.3; Mg 2+ (aq), -138; Al 3+ (aq), -322. IV. Complete and balance the following reactions. Na(s) + xss O 2 (g) Mg 3 N 2 (s) + H 2 O( l ) → K(s) + H 2 O( l ) → V. Deduce the oxidation state of the metal centers in the following. SrO 2 Li 3 N K 2 S 2 6 12 18 Ionization E, eV Atomic Number (Z ) Z X Y Z...
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