Quiz 4 Solution

E under the conditions of d 1 the reaction is

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Unformatted text preview: The reaction is at equilibrium. (2) The reaction will shift to the right. (3) The reaction will shift to the left. (4) Shifts cannot be determined from the given data. Answers: (a) 1; Two units of gas turn into one unit of gas. Thus, the entropy decreases. (b) 2; ΔG° = −101 kJ < 0 ΔS° < 0 (result from (a)) Thus, ΔH° = ΔG° + TΔS° < 0, exothermic (c) 2; Increasing T favours endothermic reaction. Because the forward reaction is exothermic, the reverse reaction is endothermic. Then, the equilibrium will shift to the left (in the reverse direction) as T increases. (d) = ! ! !! !! !! !! ! !! = ! ! ! = 1 (e) Δ = Δ ° + ln = Δ ° + ln 1 = Δ ° = −101 < 0, so (2) 2. Many cities are implementing a sacrificial-­‐anode retrofit program to further protect cast-­‐iron water pipes from rusting. (a) Which type of reaction...
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This test prep was uploaded on 04/03/2014 for the course CHEM 1b taught by Professor Heath,rees during the Spring '13 term at Caltech.

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