Air is heated from 25°C to 140°C prior to entering a combustion furnace. The change in specific enthalpy associated with this transition is 3349 J/mol. The flow rate of air at the heater outlet is 1.65 m3/min and the air pressure at this point is 122 kPa absolute.
(a) Calculate the heat requirement in kW, assuming ideal-gas behavior and that kinetic and potential energy changes from the heater inlet to the outlet are negligible.
(b) Would the value of
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