This graph depicts solution temperature as a solid dissolves. It can be conclude

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This graph depicts solution temperature as a solid dissolves. It can be concluded that this porcess (A) spontaneous, endothermix (B) spontaneous, exothermix (C) non-spontaneous, endothermic (D) non-spontaneous, exothermix 46. when a solution of any one of the acids HCI, HBr, HI, HNO_3 or HCIO_4 is reacted with a solution of any one of the bases LiOH, NaOH, KOH or RbOH, the H^6 is -56 kj mol^1. Why do all of these reactions have the same Hdegree ? (A) All of these reactions form a salt. (B) All of these reactions have the same net ionic reaction. (D) All of these acids form week conjugate bases and all of these bases form week conjegate acids. 47. Which is a correct statement of the third law of thermodymanics? (A) The energy of the universe is constant. (B) The entropy of the universe is constant. (C) The entropy of a perfect crystal is zero zt zero K. (D) The energy of a system is controlled by the entropy of that system. 48. To cause the largest increase in entropy for one mole of an idcal gas, the temperature and the volume. (A) decrease, decrease (B) increase, decrease (C) decrease, increase (D) increase, increase 49. Which has the highest standard molar entropy? (A) CH_4(g) (B) CH_3CH_2CH_3(g) (C) CH_3(CH_2)_2CH_3(g) (D) CH_3CH_2CH_3(1) 50. When glucose (C1H_12O_2) is metabolized in the body to CO_2(g) and H_2O(1), AH' =.2803 kj mol of glucose can this information be used to determine how much heat would be released if 1 mole of glueose was buned at 1 aim to form CO_2(g) and H_2O(1)? (A) NO, but it would be greater than 2803 kj. (B) No, because q is path dependent. (C) Yes, and it would be greater than 2803 kj. (D) Yes, and it would be approximately 2803 kj. 51. Gdegree for a reaction is a large, negative number. The reaction also has a very large energy of activation. At standard conditions for this reactions, which statement is correct? (A) This not a spontaneous reaction. (B) This is an explosive, exothermic reaction. (C) The reaction is spontaneous, but will occur slowly. (D) When the reactants are mixed the reaction will rapidly go to completion. 52. Which is true for a spontanuous process? (A) The entropy of the system always increases. (B) the entropy of the system always decreases. (C) The entropy of the universe always increase. (D) The entropy change of the system is equal and opposite to the entropy change of the surroundings. 53. Consider a galvanic cell based on the half reachtions:

Explanation / Answer

45 A. edothermic and spontaneous

46.C

H+ + OH- ------> H2O same ionic equation

47.C

48.D

temperature is increases volume is increases.

49. A

entropy for gases is more and less molar mass of gas

50.B

heat depends up on the path

51.

52. A

53.B

54.B

55.A

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