Practice Quiz 2.2002

Practice Quiz 2.2002 - Quiz 2 EQUATIONS and CONSTANTS E = E...

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Quiz 2 FORM A February 15, 2002 EQUATIONS and CONSTANTS: E = E o – (RT/n F ) ln Q G = G o + RT ln Q G = – nF E E = E o – (0.0257/ n) ln Q at 25 o C G = H T S G o = – nF E o E = E o – (0.0592/ n) log Q at 25 o C G o = H o T S o G o = – RT ln K E o = (RT/n F ) l n K R = 8.3145 J mol –1 K –1 F = 96,485 C/mol 1. Indicate the signs of H and S such that the reaction is spontaneous at all temperatures. H S a) b) + c) + d) + + 2. Consider the following reaction: H + (aq) + OH (aq) —> H 2 O (l) H = –56 kJ How much heat is released when 100 mL of 0.4 M HCl is mixed with 100 mL of 0.3 M Ba(OH) 2 ? a) 3.36 kJ b) 5.60 kJ c) 1.68 kJ d) 56.0 kJ e) 2.24 kJ 3. What is the oxidation state (number) for S in Na 2 S 2 O 3 a) + 2 b) – 2 c) + 4 d) – 4 e) none of these 4. In an electrochemical cell, a cobalt electrode is immersed in a Co 2+ solution and a lead electrode is immersed in a Pb 2+ solution.
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Practice Quiz 2.2002 - Quiz 2 EQUATIONS and CONSTANTS E = E...

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