5. A glass melting furnace is burning ethene (C2H4) in pure oxygen. The furnace operates at an equivalence ratio of 0.9 and consumes 30kmol/hr of ethene. You can assume that the products of combustion contain water vapor. Determine the energy input rate to the furnace (in kW) and the consumption rate of oxygen (O2) in kg/s. 6. Natural gas is primarily composed of methane, but it also contains small amounts of propane, ethane, butane, etc. Let's assume that natural gas can be modelled by a mixture of methane and propane. If the volume fraction of propane is , that is =nC3H8/(nCH4+nC3H8), estimate the natural gas heat of combustion (HOC) as a function of . Plot HOC for ranging between 0.5 and 1. Assume the fuel/air equivalence ratio to be one