A stream of $1k\frac{g}{m}in$ of saturated water vapor at $1$atm is adiabatically mixed with a $2K\frac{g}{m}in$ liquid stream of ethanol at $25C.$ Calculate exit temperature. $($risposta: $T=80C)$

What is the power needed to heat $1k\frac{g}{s}40\%$ wt ethanol in water mixture from $20C$ to $84C??($risposta: $P=500KW$