# Thread: What will be the temperature difference needed in a hot air balloon to lift 1 kg...

1. ## What will be the temperature difference needed in a hot air balloon to lift 1 kg...

What will be the temperature difference needed in a hot air balloon to lift 1 kg weight if volume of balloon is 100 m^3 and temperature of atmosphere is 25 degree celsius and pressure is 1 atm. Neglect the mass of the material of the balloon.

2. Is there any formula for payload of hot air balloons?

3. Originally Posted by fardeen_gen
What will be the temperature difference needed in a hot air balloon to lift 1 kg weight if volume of balloon is 100 m^3 and temperature of atmosphere is 25 degree celsius and pressure is 1 atm. Neglect the mass of the material of the balloon.
What are the weight of 100m^3 of hot air as a function of t? What is the weight of 100m^3 of 25 degree C air? The difference between those weights is the 'bouyant' force on the balloon. Set that equal to the weight of a 1 kg mass and solve for t.

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# what will be the temperature difference needed in a hot air ballone

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