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Title: On a cold winter day, the outside temperature is -20°C and the inside temperatur Post by: ppk on Mar 7, 2012 On a cold winter day, the outside temperature is -20°C and the inside temperature is maintained at 20°C. There is a net heat flow to the outside through the walls, roof, etc., of 25 kW. At what rate is the air outside the house gaining entropy as a result of this process?
A) 13 W/K B) 25 W/K C) 85 W/K D) 99 W/K E) 0 W/K Title: Re: On a cold winter day, the outside temperature is -20°C and the inside temperatur Post by: bio_man on Jan 17, 2015 ΔS = Δq/T1
ΔS = 25000/(253) ΔS = 98.9 W/K (approx 99 W/K) |