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387 - EASA BPL Hot-Air Balloon Theory in English - How does a gas react when released from a pressurized container?

Question 387 - Principles of Flight (Balloon) - BPL Hot-Air Balloon Pilot Licence

The gas cools adiabatically due to expansion
The gas cools due to thermal contact with environmental air
The gas heats adiabatically due to expansion
The gas condenses inside the envelope

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