Please help with both. Thanks. Will rate! 47. Questions 47-48 refer to the follo

Question

Please help with both. Thanks. Will rate!

47. Questions 47-48 refer to the following information. The equation above represents the decomposition of compound XY2. The diagram below shows two reaction profiles (path one and path two) for the decomposition of XY2 Path One 3001Jmo 200 kJ mol Path Two 100 kJ mol Reaction Progress Which of the following most likely accounts for the difference between reaction path one and reaction path two? (A) The presence of a catalyst in path one (B) The presence of a catalyst in path two (C) A higher temperature on path one (D) A higher temperature on path two AP Chem Exam 2014 MC 44 Which of the following best describes the net flow of heat when 3.0 mol of XY2 decomposes following path one? 48. (A) 900 kJ of heat is transferred to the surroundings as kinetic energy (B) 900 kJ of heat is changed into potential chemical energy. (C) 300 kJ of heat is transferred to the surroundings as kinetic energy. (D) 300 kJ of heat is changed into potential chemical energy.

Explanation / Answer

47)

in presence of catalyst, the activation energy of reaction decreases. The activation energy of path two is less than that of path one.

option B is the answer.

48)

this is endothermic reaction.

energy difference between product and reactant is 100 KJ/mole.

so when there are 3.0 mole XY2 reacting then

3.0 * 100 = 300 KJ of heat changed into potential energy.

option D is the answer.

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