Question

A fuel gas containing 95 mole% methane and the balance ethane is burned completely with 25% excess air. The stack gas leaves the furnace at 900°C and is cooled to 450°C in a waste- heat boiler. For a 100 moles of fuel into the furnace; 1. Calculate the number of moles of oxygen in the product gas [5 marks] 2. Calculate the total enthalpy change(kJ) for carbon dioxide due to the cooling process [5 Marks]

          A fuel gas containing 95 mole% methane and the balance ethane is burned completely with
25% excess air. The stack gas leaves the furnace at 900°C and is cooled to 450°C in a waste-
heat boiler. For a 100 moles of fuel into the furnace;
1. Calculate the number of moles of oxygen in the product gas [5 marks]
2. Calculate the total enthalpy change(kJ) for carbon dioxide due to the cooling process
[5 Marks]

A fuel gas containing 95 mole% methane and the balance ethane is burned completely with
25% excess air. The stack gas leaves the furnace at 900°C and is cooled to 450°C in a waste-
heat boiler. For a 100 moles of fuel into the furnace;
1. Calculate the number of moles of oxygen in the product gas [5 marks]
2. Calculate the total enthalpy change(kJ) for carbon dioxide due to the cooling process
[5 Marks]

Added by Kevin M.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

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A fuel gas containing 95 mole% methane and the balance ethane is burned completely with 25% excess air. The stack gas leaves the furnace at 900Â°C and is cooled to 450Â°C in a waste-heat boiler. For 100 moles of fuel into the furnace: 1. Calculate the number of moles of oxygen in the product gas [5 marks]. 2. Calculate the total enthalpy change (kJ) for carbon dioxide due to the cooling process [5 marks].