Question

48. When we look at the relationship between AGº and K and the data in Table 19.5, what information can be extracted from the data? Page 9 TABLE 19.5 Relationship between AG and K at 298 K AG", kJ/mol K +200 9.1 x 10 +100 30 X 10-19 17 x 10 +10 18 x 10-2 67 x 10 0 1.0 15 -10 56 x 10 5.8 x 10 -100 3.3 x 107 -200 1.1 X 10 -10 A) When AG® is positive, K< 1.0, favors reactants nonspontaneous reaction B) When AG® is negative, K> 1.0, favors reactants → spontaneous reaction C) When AG® is positive, K< 1.0, favors products → spontaneous reaction D) When AGº is negative, K> 1.0, favors products - nonspontaneous reaction 49. The thermodynamic quantity that expresses the extent of randomness in a system is A) enthalpy B) internal energy C) bond energy D) entropy E) heat flow 50. The common ion effect is defined as the following: A) The common ion effect only works with buffer solutions. B) The solubility of a slightly soluble salt is increased by the presence of a second solute that provides a common ion. C) The common ion does not have an effect on the solubility of the slightly soluble salt. D) The solubility of a slightly soluble salt is decreased by the presence of a second solute that provides a common ion 51. An electrochemical cell has an overall cell potential of Ece -- 1.37 V. The cell is A) electrolytic B) nonspontaneous C) energetic D) spontaneous

Answer 1

Ans & The Froll values of the reaction is ep. The thermodynamie quantity that expresses of the extent of randomness in a system is a Am entropy expresses the extent of v pondomnes 50. The common ions espect is defined as the following AND D) The solubility of slightly soluble salt is decreased by the presence of a si second solute that provides ails common lon. 51. An electrochemical coll has a overall cell potential of celu = - 1.37. The cell is ? negative. Hence the cell is nonspontaneous.