In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are "burned" to water vapor andCO2.
Write a combustion reaction for ethanol.
I need help with balancing the equation
i think it's
C2H6OH(l) + 3O2(g) ---> 2CO2(g) + 3H2O(g)
am I correct?..thanks!•chemistry - paul, Sunday, October 25, 2015 at 3:06pm
looks good to me, except the C2H6OH should be C2H5OH.
comment:
I did that, but it said...try again!
then it said HINT:
Start by writing a balanced chemical equation for the fermentation reaction of C6H12O6 and for the respiration reaction (combustion) of C6H12O6...what formula should be used to find the standard enthalpy of a reaction? Use the standard enthalpy of formation values from your textbook when calculating the standard enthalpy of reaction for both fermentation and respiration. thanks!
To balance the combustion equation for ethanol (C2H5OH), you need to make sure that the number of atoms for each element is the same on both sides of the equation. Here's the balanced equation:
C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(g)
The balanced equation shows that one molecule of ethanol reacts with three molecules of oxygen gas to produce two molecules of carbon dioxide gas and three molecules of water vapor.
However, it seems like there might be some confusion in your original question. In the context of winemaking, ethanol is typically produced through fermentation of glucose (C6H12O6) by yeast, rather than directly from grapes. So, it's important to differentiate between the combustion of ethanol (as you asked) and the fermentation of glucose in winemaking.
If you need help balancing the fermentation reaction for glucose (C6H12O6) and the combustion reaction for glucose, it would be helpful to know the specific equations you are working with. Additionally, to calculate the standard enthalpy of a reaction, you can use the formula:
ΔH° = ΣnΔH°f(products) - ΣnΔH°f(reactants)
In this formula, ΔH° represents the standard enthalpy change of the reaction, ΣnΔH°f(products) is the sum of the standard enthalpy of formation values for the products, and ΣnΔH°f(reactants) is the sum of the standard enthalpy of formation values for the reactants. You can find the standard enthalpy of formation values in your chemistry textbook or other reliable sources.