Problem: The combustion of liquid ethanol (C2 H5 OH) produces carbon dioxide and water. After 4.63 mL of ethanol (density = 0.789/ml) was allowed to burn in the presence of 15.60 g of oxygen gas, 3.73 mL of water (density = 1.00/ml) was collected.Determine the theoretical yield of H2 O for the reaction.

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We are asked to determine the theoretical yield of H2O for the reaction.


Balance reaction: 

C2H5OH  + 3 O2→ 2 CO2 + 3 H2O


Molar mass C2H5OH = 46.08 g/mol

Molar mass O2 = 32.0 g/mol

Molar mass H2O =18.02 g/mol


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Problem Details

The combustion of liquid ethanol (C2 H5 OH) produces carbon dioxide and water. After 4.63 mL of ethanol (density = 0.789/ml) was allowed to burn in the presence of 15.60 g of oxygen gas, 3.73 mL of water (density = 1.00/ml) was collected.

Determine the theoretical yield of H2 O for the reaction.

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