August 2015 Chemistry Regents #73-74

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Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Questions 51-54 Questions 55-57 Questions 58-59 Questions 60-61 Questions 62-65 Questions 66-68 Questions 69-72 Questions 73-74  Questions 75-76  Questions 77-78  Questions 79-80  Questions 81-82  Questions 83-85

 

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Question 73-74

 

 

Base your answers to questions 73 through 74 on the information below and on your knowledge of chemistry.

Coal is a fuel consisting primarily of carbon. In an open system, the carbon that burns completely in air produces carbon dioxide and heat. This reaction is represented by the balanced equation below.

C(s) + O2(g) → CO2(g) + heat

73 In your answer booklet, use the key to draw at least five particles in the box to represent the phase of the product. [1]

Link to Answer #73

74 On the potential energy diagram in your answer booklet, draw a double-headed arrow (↕) to indicate the interval that represents the heat of reaction. [1]

Link to Answer #74

 

on to Questions 75-76

 

 

Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Questions 51-54 Questions 55-57 Questions 58-59 Questions 60-61 Questions 62-65 Questions 66-68 Questions 69-72 Questions 73-74  Questions 75-76  Questions 77-78  Questions 79-80  Questions 81-82  Questions 83-85

 

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