5. In any electrochemical cell, the anode is always ID: A a. the electrode at wh

Question

5. In any electrochemical cell, the anode is always ID: A a. the electrode at which some species loses electrons. b the electrode at which some species gains electrons. c.) the positive electrode. the negative electrode. the electrode at which reduction occurs. How much heat is evolved in the formation of 3501 grams of Fe 049 at 2SC ind following reaction? e. 6. _ 4Fe(s) 302(g) 2F60,6) -824.2 + a. 360.1 kJ b. 180.7 kJ c. 205.8 kJ d. 259.6 kJ e. 242. 6 kJ verall reaction 2N+2H: N, + 2H20 Rate data have been determined at a particular temperature for the o in which all reactants and products are gases. 7. Trial Run Initial [NO] Initial (H) Initial Rate (Mes' 0.10 M 0.10 M 3 0.20 M 0.20 M 0.30 M 0.20 M 0.0150 0.0225 0.0600 The rate-law expression is_ a. rate KNOJHP c. rate = k[NO]2[H2] d. rate KINOJH e. None of the preceding answers is corect. 8. In the following net ionic reaction,--is the reducing agent and--is reduced. C + H. + SOA cot so, (acidic solution) b. H, Co c. SO, H C, so2 e SO2, C Assume that the following chemical reaction is at equilibrium. 9. AKP = +26.9 kJ 2 ICl(g) L(8)+C(g) At 25 , K-2.0 x 10s. If the temperature is decreased to 15°C, which statement applies? a. Kp will increase and the reaction will proceed in the backward direction. b. Kp will decrease and the reaction will proceed in the backward direction. c. will increase and the reaction will proceed in the forward direction. K, will decrease and the reaction will proceed in the forward direction.

Explanation / Answer

moles = mass /molar mass

          = 35.01 g / 156.69 g/mol

          = 0.223 mol

DH = products- reactants

      = 2(-824.2 kJ/mol) - 0

      = -1648.4 kJ/mol

Heat = -1648.4 kJ/mol x 0.223 mol

         = -367.6 kJ

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