Problem: a. Write a balanced equation for the combustion of ethanol, C2H5OH(l) in oxygen. Carbon dioxide is produced in the gaseous state, water in the liquid state.b.The standard heat of combustion of ethanol is -1367 kJ/mol. Calculate the standard heat of formation of ethanol, ΔH.

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FREE Expert Solution

a. Combustion  → carbon dioxide is produced in the gaseous state, water in the liquid state

Combustion reaction:

C2H5OH(l) + O2(g) → CO2(g) + H2O(l)

Balance C:

C2H5OH(l) + O2(g) → 2 CO2(g) + H2O(l)

Balance H:

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

Balance O:

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


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

b. 

ΔH°rxn=ΔH°f, prod-ΔH°f, react

Δf can be found in books or the internet

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Problem Details

a. Write a balanced equation for the combustion of ethanol, C2H5OH(l) in oxygen. Carbon dioxide is produced in the gaseous state, water in the liquid state.

b.The standard heat of combustion of ethanol is -1367 kJ/mol. Calculate the standard heat of formation of ethanol, ΔH.