Question

A large room in a house holds 957 kg of dry air at 33.2°C. A woman opens a window briefly and a cool breeze brings in an additional 68.4 kg of dry air at 13.2°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.)

Answer 1