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12 Nov 2019
The mass of a hot-air balloon and its occupants is 400 kg(excluding the hot air inside the balloon). The air outside theballoon has a pressure of 1.01 105 Pa and a density of 1.29 kg/m3.To lift off, the air inside the balloon is heated. The volume ofthe heated balloon is 550 m3. The pressure of the heated airremains the same as the pressure of the outside air. To whattemperature (in Kelvins) must the air be heated so that the balloonjust lifts off? The molecular mass of air is 29 u.
The mass of a hot-air balloon and its occupants is 400 kg(excluding the hot air inside the balloon). The air outside theballoon has a pressure of 1.01 105 Pa and a density of 1.29 kg/m3.To lift off, the air inside the balloon is heated. The volume ofthe heated balloon is 550 m3. The pressure of the heated airremains the same as the pressure of the outside air. To whattemperature (in Kelvins) must the air be heated so that the balloonjust lifts off? The molecular mass of air is 29 u.
Beverley SmithLv2
24 Jul 2019
