Need help with question 10 here. Any explantion would be greatly appriciated. 9.

Question

Need help with question 10 here. Any explantion would be greatly appriciated.

9. A reaction has A A. The and AS o, Which is TRUE? of the following statements B. tion is spontaneous at all temperatures. C. e reaction is nons D. The reaction at all temperatures The is spontaneous only at high temperatures reaction is spontaneous only at low temperatures 10, Determine the EQUILIBRIUM CONSTANT for the following reaction at 298 K. Pb2 (aq) Mg(s) Pb(s) Mg2 (aq) AG onen 432 kJ 1.86 x 1010 B. 8.10 x 103 C. 2.31 x 10-22 D. 5.31 x 1075 E. 4.33 x 102. Consider the redox reaction below. During the reaction, carbon undergoes a change in oxidation state 2 Mno4 (aq) 2 H2C204 (aq) 6 H (aq) Mn? (aq) 8 H2O 10 CO2(g) A. From +2 to +4. B. From 1 to +2. C. From 3 to +2. D. From 0 to 2 E. From +3 to 4 12. The hypothetical reaction A(g) Et B(g) has a AG 0. Which of the follo constant?

Explanation / Answer

delta G = - RT ln(Keq)

-432000 = - 8.314 x 298 x ln(Keq)

Keq = 5.31 x 1075

Therefore answer is option (D).

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