January 2010 Chemistry Regents #53-55

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

Questions 51-52 Questions 53-55 Questions 56-57 Questions 58-60 Questions 61-63 Questions 64-65 Questions 66-68 Questions 69-71 Questions 72-75 Questions 76-78 Questions 79-81  Questions 82-84

 

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Questions

Base your answers to questions 53 through 55 on the information below.

A phase change for carbon dioxide that occurs spontaneously at 20.C and 1.0 atmosphere is represented by the balanced equation below.

CO2(s) + energy ==>CO2(g)

53 Write the name of this phase change. [1]

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sublimation

54 Describe what happens to the potential energy of the CO2 molecules as this phase change occurs. [1]

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The potential energy increases.

55 In your answer booklet, use the key to draw at least five molecules in the box to represent CO2 after this phase change is completed. [1]

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On to Questions 56-57

 

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

Questions 51-52 Questions 53-55 Questions 56-57 Questions 58-60 Questions 61-63 Questions 64-65 Questions 66-68 Questions 69-71 Questions 72-75 Questions 76-78 Questions 79-81  Questions 82-84

 
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