Question

15. Which statement is true if the reaction shown is spontaneous under standard conditions as written? Zn(s) + Cu2+(aq) -- Zn2+(aq) + Cu(s) (A) K is smaller than 1, 4Gº is positive, and Eº is negative. (B) K is smaller than 1, 4Gº is negative, and E° is positive. (C) K is larger than 1, 4Gº is negative, and E° is positive. (D) K is larger than 1, 4Gº is negative, and E is negative. 16. For the reaction, cis-1,2-dichloroethene - trans-1,2-dichloroethene, Kp = 8.2 at 25 °C. If the initial pressure of each isomer is 1 bar, then the partial pressures at equilibrium are (A) Ptrans = 8.2 Peis (B) Peis = 8.2 P trans (C) equal. (D) zero for one isomer, 17. An excess of H, is placed in a sealed vessel containing an equimolar mixture of F2, Cl, Br, and I2. Using the data provided, which product is present in the largest concentration at equilibrium? H2(g) + F2(g) → 2HF(g) A.Gº = -190 kJ.mol H2(g) + Cl2(g) -- 2HCl(g) $_Gº = -546 kJ-moll H2(g) + Br2(g) - 2HBr(g) A_Gº = -106 kJ mol H2(g) +I2(g) → 2HI(g) 46° = 4 kJ mol (A) HF (B) HCI (C) HBr (D) HI

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Answer 1

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