Calculate the molar percentage of ethane in the fuel gas and the percentage excess air fed to the reactor. c. Calculate rate of heat transferred to the cooling water jacket in kW.
2. 100 mol/h of gaseous ethane is burned with excess air. The fuel is mixed with air before
entering the furnace; fuel-air mixture is fed to the furnace at 25oC and 1 atm. All the ethane is
consumed in the combustion reaction that occurs in the furnace. A cooling water jacket
surrounding the furnace removes all of the heat generated by the combustion reaction. The
stack gas leaves the furnace at 25oC and 1 atm and contains 5.32 mole% CO2, 1.60% CO,
7.32% O2 and the balance H2O and N2.
a. Use Hess’s Law and the Heat of Combustion to calculate ∆??o (kJ/mol) for complete and
incomplete combustion of ethane.
b. Calculate the molar percentage of ethane in the fuel gas and the percentage excess air fed
to the reactor.
c. Calculate rate of heat transferred to the cooling water jacket in kW.
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