The enthalpy of formation of ethanol (c2h5oh (g)) is -235,310 kj/kmol at the reference state. ethanol and air enter an adiabatic combustor at 25 °c and 100 kpa, and complete combustion with 200% excess air occurs. determine the final temperature of the combustion products.

Afan that can provide air speeds up to 60 m/s is to be used in a low-speed wind tunnel with atmospheric air at 35 c. if one wishes to use the wind tunnel to study flat-plate boundary layer behavior up to reynolds numbes of re 10, what is the minimum plate length that should be used? at what distance from the leading edge would transition occur if the critical reynolds nurnber were rer,e = 5 × 105?