Problem P. 4229. (February 2010)

P. 4229. The heating system keeps the temperature of a flat at about 20 ^oC. Outside the weather is cold and damp: the temperature is 0 ^oC, and the relative humidity is 95%. What will the relative humidity of the air in the room be after airing the room, when the temperature reaches again the value of 20 ^oC? Approximately what amount of water must be vaporized in a flat of area 50 m² and of height 3 m, in order to reach the 50% relative humidity, pleasant for the human mucous membrane.

(5 pont)

Deadline expired on March 10, 2010.

Sorry, the solution is available only in Hungarian. Google translation

Megoldás. A relatív páratartalom 25% lesz a szellőztetés után. Az 50% eléréséhez 6,5 dl vizet kell elpárologtatni.

Statistics:

80 students sent a solution.
5 points:	63 students.
3 points:	3 students.
2 points:	10 students.
1 point:	1 student.
0 point:	2 students.
Unfair, not evaluated:	1 solutions.

Problems in Physics of KöMaL, February 2010