physics question

INDOOR CLIMATE IN AN OFFICE. For Offices to feel comfortable, we like the relative murray indoors to be about 60% anti ine temperature to be about 25"C. An office can be modelled as an open systent, Ry i Scuuon 3.5 of the textbook: outside air flows into the office, where it is heated by a radiamr At the same time the office loses hear through the walls We assume that the air proverbes in the office are homogeneous throughout the office The sitturion can be summarized with the Thi swing schematic. Conductive heat loss vent raidintor Ventin a) How much water (in gram) would the air contain in a small one-person office of 25 cubic metres? b) Suppose we measure a 35% relative humidity in this office. Calculate whether we can bring the relative humidity in the office up to the comfortable level by closing the air vents and putting a cup of water on the radiator" An office typically refreshes its air content every twenty minutes or so, that is, air in the office gets completely replaced by outside air over the duration of twenty minutes, c) When the office air is refreshed every twenty minutes with air coming from outside, and the outside temperature is 9"C, what is the minimum heat output (in Watt) of the radiator, to keep the office temperature at 25"C? dj In the above situation, the total heat output of the radiator is 1050 W; the extra output corresponds to the conductive heat loss through the walls. Can you predict what total heat output is required if the outside temperature drops to 0C