January 2012 Chemistry Regents #55-57

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Question

Base your answers to questions 55 through 57 on the information below.

 

Starting as a gas at 206C, a sample of a substance is allowed to cool for 16 minutes.

This process is represented by the cooling curve below.

55 What is the melting point of this substance? [1]

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90C 2C

56 At what time do the particles of this sample have the lowest average kinetic energy? [1]

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16 minutes

57 Using the key in your answer booklet, draw two particle diagrams to represent the two phases of the sample at minute 4. Your response must include at least six particles for each diagram. [1]

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on to Questions 58-59

  

Other Regents Exams

Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50 Questions 51-54 Questions 55-57 Questions 58-59 Questions 60-62 Questions 63-65 Questions 66-69  Questions 70-71  Questions 72-74 Questions 75-78  Questions 79-81  Questions 82-85

 
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