c6.1.5 making ethanol

Question 1

what are the two ways ethanol can be made

Answer 1

Fermentation and hydration of ethene

Question 2

fermentation equation

Answer 2

C6H12O6 (aq) –> 2CO2 (g) + 2C2H5OH (aq)

Question 3

Temperature for fermentation

Answer 3

usually 35 degrees

enzymes stop working at 50 degrees

Question 4

hydration of ethene formula

Answer 4

C2H4 (g) + H2O (l) <=> C2H5OH (l)

change in energy= -45 kj/mol

Question 5

Temperature for hydration of ethene

Answer 5

300 degrees

Question 6

Pressure for hydration of ethene

Answer 6

60 atm

Question 7

Is a catalyst needed for hydration of ethene

Answer 7

yes- phosphoric acid catalyst

Question 8

method for fermentation

Answer 8

1. mix glucose solution and yeast in a conical flask
2. attach a bung with a straw
3. put the other end of the straw into a test tube with limewater
4. limewater should turn cloudy if CO2 is present