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    Chemical Principles Study Set 4
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    Exam 10: Spontaneity, Entropy, and Free Energy
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    Given CH 3 CO 2 H(aq) H + (Aq)
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Given CH3CO2H(aq) H+(aq) + CH3CO2-(aq)

Question 69

Question 69

Multiple Choice

Given
CH3CO2H(aq) Given CH<sub>3</sub>CO<sub>2</sub>H(aq)    H<sup>+</sup>(aq)  + CH<sub>3</sub>CO<sub>2</sub><sup>-</sup>(aq)  at 25°C, K<sub>a</sub> = 1.8 × 10<sup>-5</sup> -What is ΔG at 25°C for a solution in which the initial concentrations are   A)  +50. kJ B)  -50. kJ C)  +23 kJ D)  -23 kJ E)  27 kJ H+(aq) + CH3CO2-(aq)
at 25°C, Ka = 1.8 × 10-5
-What is ΔG at 25°C for a solution in which the initial concentrations are Given CH<sub>3</sub>CO<sub>2</sub>H(aq)    H<sup>+</sup>(aq)  + CH<sub>3</sub>CO<sub>2</sub><sup>-</sup>(aq)  at 25°C, K<sub>a</sub> = 1.8 × 10<sup>-5</sup> -What is ΔG at 25°C for a solution in which the initial concentrations are   A)  +50. kJ B)  -50. kJ C)  +23 kJ D)  -23 kJ E)  27 kJ


A) +50. kJ
B) -50. kJ
C) +23 kJ
D) -23 kJ
E) 27 kJ

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