Q$2)$

$(8$ points$)$

a$)2000$ cfm air at $10C,$ drt and $5C$ wbt is mixed with $1000$ cfm warm air at $40C,$ dbt and $30C,$ wbt$.$ Find the resulting conditions of the mixed air. i$.$e$,$ humidity ratio, enthalpy, relative humidity and specific volume.

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b$)$ Summer design condition for a given location is $41C$ and $20\%RH,$ What is the minimum dry bulb temperature that can be achieved if the evaporative cooling is applied.