what mass of air exists in a 5*6*8 m³ room at 20°C? Take the average molecular mass of air to be 28 kg k-1 mol-1
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Step-by-step explanation:
Volume of air in the room = 6 x10 x 4= 240 m³ .
The density if air at 101.325 kPa and 15°C is 1.225- kg/ m³
So density of air at 100kPa and 25°C
= 1.225 x (100/101.325) x (288/198)
= 1.1684- kg/ m³
Therefore mass of air in the room =1.1684 x 240
= 280.416- kg
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