A large room in a house holds 947 kg of dry air at 29.2°C. A woman opens a window briefly and a cool breeze brings in an additional 68.4 kg of dry air at 16.2°C. At what temperature (in degrees Celsius) will the two air masses come into thermal equilibrium, assuming they form a closed system? (The specific heat of dry air is 1006 J kg · °C , although that value will cancel out of the calorimetry equation.)
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