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Alcohols for Use as Biofuels Can Be Produced from Glucose

Question 78

Multiple Choice

Alcohols for use as biofuels can be produced from glucose that is obtained from starch and cellulose in plants. Use the information in the table below to determine the free-energy change and whether or not this reaction is spontaneous at 78C, which is the boiling point of an ethanolwater azeotrope. Alcohols for use as biofuels can be produced from glucose that is obtained from starch and cellulose in plants. Use the information in the table below to determine the free-energy change and whether or not this reaction is spontaneous at 78<font face= symbol ></font>C, which is the boiling point of an ethanol<font face= symbol ></font>water azeotrope. A) (<font face= symbol ></font>6 kJ, spontaneous) B) (<font face= symbol ></font>76 kJ, not spontaneous) C) (<font face= symbol ></font>76 kJ, spontaneous) D) (<font face= symbol ></font>258 kJ, not spontaneous) E) (<font face= symbol ></font>258 kJ, spontaneous) Alcohols for use as biofuels can be produced from glucose that is obtained from starch and cellulose in plants. Use the information in the table below to determine the free-energy change and whether or not this reaction is spontaneous at 78<font face= symbol ></font>C, which is the boiling point of an ethanol<font face= symbol ></font>water azeotrope. A) (<font face= symbol ></font>6 kJ, spontaneous) B) (<font face= symbol ></font>76 kJ, not spontaneous) C) (<font face= symbol ></font>76 kJ, spontaneous) D) (<font face= symbol ></font>258 kJ, not spontaneous) E) (<font face= symbol ></font>258 kJ, spontaneous)


A) (6 kJ, spontaneous)
B) (76 kJ, not spontaneous)
C) (76 kJ, spontaneous)
D) (258 kJ, not spontaneous)
E) (258 kJ, spontaneous)

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