Problem: Ethanol can be made from the fermentation of crops and has been used as a fuel additive to gasoline. Calculate ΔH˚rxn for the combustion of ethanol.

FREE Expert Solution
  • Combustion reaction is an exothermic reaction involving a fuel (usually hydrocarbon) and an oxidant (O2 most of the time) forming gaseous products like H2O (g), CO2 (g) etc.
  • The balanced combustion reaction of ethanol (CH3CH2OH) will appear as:

CH3CH2OH (l) + 3O2 (g) → 2CO2 (g) + 3H2O (g)

  • ΔHcombustion can be calculated using the equation:

View Complete Written Solution
Problem Details

Ethanol can be made from the fermentation of crops and has been used as a fuel additive to gasoline. Calculate ΔH˚rxn for the combustion of ethanol.

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Enthalpy of Formation concept. You can view video lessons to learn Enthalpy of Formation. Or if you need more Enthalpy of Formation practice, you can also practice Enthalpy of Formation practice problems.