August 2009 Chemistry Regents #68-72

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Questions

Base your answers to questions 68 through 72 on the information below.

 

Biodiesel is an alternative fuel for vehicles that use petroleum diesel. Biodiesel is produced by reacting vegetable oil with CH3OH. Methyl palmitate, C15H31COOCH3, a compound found in biodiesel, is made from soybean oil. One reaction of methyl palmitate with oxygen is represented by the balanced equation below.

2C15H31COOCH3 + 49O2==>34CO2 + 34H2O + energy

68 Write an IUPAC name for the compound that reacts with vegetable oil to produce biodiesel. [1]

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methanol     or   methyl alcohol

69 Explain, in terms of both atoms and molecular structure, why there is no isomer of CH3OH. [1]

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There are too few atoms to create a different molecular structure

70 Identify the class of organic compounds to which methyl palmitate belongs. [1]

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ester

71 Identify the type of organic reaction represented by the balanced equation. [1]

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combustion

72 State evidence from the balanced equation that indicates the reaction is exothermic. [1]

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energy is a product (on the right side)

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