For the reaction of butane burned with stoichiometric air, the dew-point temperature of the products is nearest (assume Patm = 100 kPa):
A) 44°C
B) 48°C
C) 51°C
D) 54°C
D) 54°C
The dew-point temperature of the products is that temperature of the products at which moisture
would begin to condense out. The balanced reaction is
The partial pressure of the water vapor requires the ratio yvapor of the moles of water vapor to the
total moles of the products. Assuming 
The temperature at which condensation occurs is found in Table C-1 to be close to 54°C.
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