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4. Question (a) A methane burner can be represented by the following combustion equation. CH4 + 2O2 . CO2 + 2H2O If one tonne of methane is burnt, how many tonnes of carbon dioxide is produced? (6 marks) (b) If insufficient oxygen is supplied to the methane burner and carbon monoxide is produced instead of carbon dioxide. Derive the combustion equation. (3 marks) (c) The methane burner supplies a total annual household heat requirement of 1800 kWh per year. Calculate the required methane supply in kilograms, assuming that it is operating at 0.21 kg CO2 per kWh. (3 marks) (d) Briefly state five potential benefits of biofuels. (6 marks) (e) A gasifier has been designed to use 20 tonnes an hour of air-dried chopped wood, producing 40 tonnes an hour of fuel gas and the energy content is 5 GJ per tonne. Running the plant requires a constant input of 25 MW supplied by the output gas. If the energy content of air-dried wood is 11 GJ per tonne, what is the overall maximum conversion efficiency of the system? Why is the actual efficiency likely to be lower? (7 marks) 

          4. Question
(a)
A methane burner can be represented by the following combustion equation.
CH4 + 2O2 . CO2 + 2H2O
If one tonne of methane is burnt, how many tonnes of carbon dioxide is produced?
(6 marks)
(b)
If insufficient oxygen is supplied to the methane burner and carbon monoxide is produced instead of carbon dioxide. Derive the combustion equation.
(3 marks)
(c)
The methane burner supplies a total annual household heat requirement of 1800 kWh per year. Calculate the required methane supply in kilograms, assuming that it is operating at 0.21 kg CO2 per kWh.
(3 marks)
(d)
Briefly state five potential benefits of biofuels.
(6 marks)
(e)
A gasifier has been designed to use 20 tonnes an hour of air-dried chopped wood, producing 40 tonnes an hour of fuel gas and the energy content is 5 GJ per tonne. Running the plant requires a constant input of 25 MW supplied by the output gas. If the energy content of air-dried wood is 11 GJ per tonne, what is the overall maximum conversion efficiency of the system? Why is the actual efficiency likely to be lower?
(7 marks)
Show more…
4. Question (a) A methane burner can be represented by the following combustion equation. CH4 + 2O2 . CO2 + 2H2O If one tonne of methane is burnt, how many tonnes of carbon dioxide is produced? (6 marks) (b) If insufficient oxygen is supplied to the methane burner and carbon monoxide is produced instead of carbon dioxide. Derive the combustion equation. (3 marks) (c) The methane burner supplies a total annual household heat requirement of 1800 kWh per year. Calculate the required methane supply in kilograms, assuming that it is operating at 0.21 kg CO2 per kWh. (3 marks) (d) Briefly state five potential benefits of biofuels. (6 marks) (e) A gasifier has been designed to use 20 tonnes an hour of air-dried chopped wood, producing 40 tonnes an hour of fuel gas and the energy content is 5 GJ per tonne. Running the plant requires a constant input of 25 MW supplied by the output gas. If the energy content of air-dried wood is 11 GJ per tonne, what is the overall maximum conversion efficiency of the system? Why is the actual efficiency likely to be lower? (7 marks)

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Chemistry: Structure and Properties
Chemistry: Structure and Properties
Nivaldo Tro 2nd Edition
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(a) A methane burner can be represented by the following combustion equation. CH4 + 2O2 . CO2 + 2H2O If one tonne of methane is burnt, how many tonnes of carbon dioxide is produced? (b) If insufficient oxygen is supplied to the methane burner and carbon monoxide is produced instead of carbon dioxide. Derive the combustion equation. (c) The methane burner supplies a total annual household heat requirement of 1800 kWh per year. Calculate the required methane supply in kilograms, assuming that it is operating at 0.21 kg CO2 per kWh. (d) Briefly state five potential benefits of biofuels. (e) A gasifier has been designed to use 20 tonnes an hour of air-dried chopped wood, producing 40 tonnes an hour of fuel gas and the energy content is 5 GJ per tonne. Running the plant requires a constant input of 25 MW supplied by the output gas. If the energy content of air-dried wood is 11 GJ per tonne, what is the overall maximum conversion efficiency of the system? Why is the actual efficiency likely to be lower?
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Transcript

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00:01 In this question we are considering for naphthalene solution that is dissolved in benzene for which we have the given information.
00:19 If we calculate the moles of naphthalene it will be equal to the given mass of naftylene of naftylene divided by its molar mass that becomes equal to 78 .8 divided by 128 .16, which gives us the number of moles as .6148 moles...
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