Methane (CH4) at 25 C and 1 atm enters a furnace that operates in a stable state where its complete combustion occurs with 240% of the theoretical air that enters at 400 K and 1 atm. Combustion products leave at 800 K and 1 atm. If the heat transfer from the furnace to the surroundings is 400 kW, determine the methane flux in kg/s.

3) Metano (CH4) a 25 C y 1 atm entra a un horno que opera en estado estable donde ocurre su combustin completa con 240% del aire terico que entra a 400 K y 1 atm. Los productos de la combustin salen a 800 K y 1 atm. Si la transferencia de calor del horno hacia los alrededores es de 400 kW, determine el flujo de metano en kg/s