June 2013 Chemistry Regents #78-80

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Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50

Question 51-53 Questions 54-56 Questions 57-59 Questions 60-62 Questions 63-65 Questions 66-69 Questions 70-73 Questions 74-77  Questions 78-80  Questions 81-82  Questions 83-85

 

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Base your answers to questions 78 through 80  on the information below.

One process used to manufacture sulfuric acid is called the contact process. One step in this process, the reaction between sulfur dioxide and oxygen, is represented by the forward reaction in the system at equilibrium shown below.

A mixture of platinum and vanadium(V) oxide may be used as a catalyst for this reaction. The sulfur trioxide produced is then used to make sulfuric acid.

78 Determine the amount of energy released when 1.00 mole of sulfur trioxide is produced. [1]

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197 kJ

79 Write the chemical formula for vanadium (V) oxide. [1]

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V2O5

80 On the labeled axes in your answer booklet, complete the potential energy diagram for the forward reaction represented by this equation. [1]

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ANSWER

on to Questions 81-82

 

 

Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50

Question 51-53 Questions 54-56 Questions 57-59 Questions 60-62 Questions 63-65 Questions 66-69 Questions 70-73 Questions 74-77  Questions 78-80  Questions 81-82  Questions 83-85

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