Propane gas C3H8 enters a combustion chamber operating at steady state condition at 1 bar, 25ºC and is burned with 150% theoretical air that enters the combustion chamber at the same state. The products leave the combustion chamber at 1 bar and 1200 K.
a) Write down the balanced chemical equation for the complete combustion.
b) Write down the balanced actual combustion reaction and calculate c) the air fuel ratio on a mass basis, d) the dew point temperature of the products in ºC, e) the heat transfer in terms of kJ/kmol of fuel.

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Explanation:

Balanced equation or stoichiometry equation means in a product after reaction there is no unburned carbon compound left or we can say the oxygen is sufficient to combine with all the carbon and hydrogen moleculs to form Carbon-dioxide and water respectively.

The dew point temperature of balanced equation will be 100°c because water vapour bis present in it and it will condense at 100°c at 1 bar pressure while the other products need much lower temperatures to liquify.

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