Problem: Ethanol (C2H5OH) is currently blended with gasoline as an automobile fuel.Calculate the mass of CO2 produced per kJ of heat emitted.

FREE Expert Solution

We are asked to calculate the mass of CO2 produced per kJ of heat emitted.


ΔH°rxn=ΔH°f, prod-ΔH°f, react


Note that we need to multiply each ΔH˚f by the stoichiometric coefficient since ΔH˚f is in kJ/mol. 

Also, note that ΔH˚f for elements in their standard state is 0.


Balanced reaction: 

C2H5OH(g) + 6 O2(g)→ 4 CO2(g) + 4 H2O(g) 

Molar mass CO2 = 44.01 g/mol


View Complete Written Solution
Problem Details

Ethanol (C2H5OH) is currently blended with gasoline as an automobile fuel.

Calculate the mass of CO2 produced per kJ of heat emitted.