is this the answer to B )
C2H5OH(liq)+ 3O2(g) --> 2CO2(g) +3H2O(liq)
In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and ethanol are "burned" to water vapor andCO2.
Write a combustion reaction for ethanol. INCLUDE PHYSICAL STATES
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!
not balanced.
C2H5OH+ 3O2 >>> 2CO2 + 3H2O
The balanced equation you provided, C2H5OH(liq) + 3O2(g) --> 2CO2(g) + 3H2O(liq), is correct.
In the comment, the hint suggests starting with the balanced equations for the fermentation of C6H12O6 (sugar) and the respiration (combustion) of C6H12O6.
The balanced equation for fermentation is:
C6H12O6(aq) → 2C2H5OH(aq) + 2CO2(g)
The balanced equation for respiration (combustion) is:
C6H12O6(aq) + 6O2(g) → 6CO2(g) + 6H2O(liq)
To balance the equation with C2H5OH, we need to multiply the coefficients by 3:
C6H12O6(aq) + 3O2(g) → 3C2H5OH(aq) + 3CO2(g)
Now, if we look back at the reaction you provided:
C2H5OH(liq) + 3O2(g) → 2CO2(g) + 3H2O(liq)
We can see that it matches the balanced equation for fermentation when the states (liq or g) are ignored.
So, your initial answer, C2H6OH(l) + 3O2(g) → 2CO2(g) + 3H2O(g), was almost correct. The only change needed is to correct the formula to C2H5OH instead of C2H6OH.