January 2015 Chemistry Regents #56-58

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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

Question 51-53 Questions 54-55
 Questions 56-58 Questions 59-61 Questions 62-63 Questions 64-65 Questions 66-68 Questions 69-72  Questions 73-75  Questions 76-78  Questions 79-81 Questions 82-85

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Base your answers to questions 56 through 58 on the information below and on your knowledge of chemistry. 

 


The formulas and the boiling points at standard pressure for ethane, methane, methanol, and water are shown in the table below.

56 Identify the compound that has the strongest intermolecular forces. [1]

Answer==>  water

57 State the change in potential energy that takes place in a sample of methane as it boils at 161.5C. [1]

Answer ==>Potential energy increases.

58 Explain, in terms of molecular polarity, why the solubility of methanol in water is greater than the solubility of methane in water. [1]

Answer==>Methanol and water molecules are polar, but methane molecules are nonpolar.

on to Questions 59-61

 

 
 

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

Question 51-53 Questions 54-55
 Questions 56-58 Questions 59-61 Questions 62-63 Questions 64-65 Questions 66-68 Questions 69-72  Questions 73-75  Questions 76-78  Questions 79-81 Questions 82-85

 

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