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 write a balanced combustion reaction for ethanol, you need to make sure that the number of atoms of each element is equal on both sides of the equation. Here's the correct balanced equation for the combustion of ethanol:
C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(g)
The key to balancing this equation is ensuring that the number of carbon, hydrogen, and oxygen atoms is equal on both sides of the equation. By adding coefficients in front of the chemical formulas, you can ensure balance. In this case, you need 2CO2 to have 2 carbon atoms, so you need 2 in front of CO2. Similarly, you need 3H2O to have 6 hydrogen atoms, so you need 3 in front of H2O. Finally, to balance the oxygen atoms, you need 3O2 on the left-hand side, which gives you 6O2 when multiplied by 2.
Regarding the comment about the fermentation reaction and the respiration (combustion) reaction of C6H12O6 (glucose), it suggests that you need to write the balanced chemical equations for these reactions before calculating the standard enthalpy of the reactions. Additionally, it asks for the formula to be used to find the standard enthalpy of a reaction.
To find the standard enthalpy of a reaction, you can use the formula:
ΔH° = Σ[ΔH°f(products)] - Σ[ΔH°f(reactants)]
where ΔH° is the standard enthalpy change of the reaction, Σ denotes a sum of the enthalpies, and ΔH°f represents the standard enthalpy of formation of each compound.
You can use the standard enthalpy of formation values from your textbook to calculate the standard enthalpy of reaction for both the fermentation and respiration reactions by substituting the values into the equation mentioned above.