is this right?

C2H6O + 3O2 = 2CO2 + 3H2O

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!•Chemistry - DrBob222, Monday, October 26, 2015 at 5:30pm
See this site. Zymase is just a catalyst.

According to the site I gave you, the reaction is for the fermentation.

C6H12O6 ==> 2C2H5OH + 2CO2

In order to balance the combustion reaction for ethanol (C2H5OH), you need to ensure that the number of atoms on each side of the equation is equal. Here's the balanced equation:

C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(g)

Make sure you are using the correct formula for ethanol, which is C2H5OH, not C2H6OH as you mentioned.

If the equation you wrote is still not accepted, it seems like the problem is asking you to start by writing a balanced chemical equation for the fermentation of C6H12O6 (glucose) and for the respiration (combustion) of C6H12O6. These two equations would be used to find the standard enthalpy of the reaction.

Standard enthalpy of reaction can be calculated using the standard enthalpy of formation values from your textbook. These values represent the change in enthalpy when one mole of a compound is formed from its constituent elements in their standard states.

To find the standard enthalpy of the reaction, you can subtract the sum of the standard enthalpies of formation of the reactants from the sum of the standard enthalpies of formation of the products.

By following these steps, you should be able to find the standard enthalpy of reaction for both the fermentation and respiration processes.