It all has to do with the gas law PV=nRT. When the Temperature "T" increases, the volume of the gas increases which inflates the balloon. It rises because this now warm gas rises through the cooler surrounding air. Warm air rises, cool air sinks
The heating of the air through the use of a burner is what makes balloons rise.
Turning on the burner in a hot air balloon heats the air inside the balloon, reducing its density. This decrease in density causes the balloon to become lighter than the surrounding air, which helps it to rise. The heated air adds buoyancy, allowing the balloon to ascend.
The burner in a hot air balloon is crucial because it generates the hot air that fills the balloon's envelope. By heating the air, the burner decreases its density, allowing the balloon to rise due to the principle of buoyancy, as hot air is lighter than the cooler air outside. The burner also allows for altitude control; by adjusting the flame, the pilot can maintain or change the balloon's height. Without the burner, the balloon would not be able to lift off or stay airborne.
A hot air balloon is powered by burning propane in the burner, which heats the air inside the balloon envelope. As the air inside the balloon heats up, it becomes less dense than the surrounding air, causing the balloon to rise. The pilot can control the altitude by adjusting the burner intensity to heat the air more or less.
Hot air balloons are filled with hot air from a propane burner in the basket. Hot air rises. So provided the cooling air in the balloon is topped up from short blasts from the burner, the balloon will rise off the ground.
To increase enthalpy.the burner uses flames to heat the air so the balloon will rise
The hot air from the gas burner rises and enters the balloon's envelope. Once there is enough hot air trapped, the whole balloon will begin to lift off the floor. This is due entirely to the fact that hot air rises.
To keep it hot you. The REASON they use a 'Burner' in a Hot Air Balloon is to 'heat the Air, to 'fill' the Balloon, so it will 'rise'... The only other way to get the air Hot enough to fill the Balloon, would be to make the 'Basket' MUCH, MUCH Larger, and fill it with Liberals, and just let them talk. BUT, I don't think the Balloon would ever get off the ground, because, the BULLCRAP would counteract the Hot Air, and they would cancel each other out...
They move around faster and faster, causing the temperature to increase, and because hot air rises above cold air, the balloon lifts, applying lift to the basket, causing the hot air balloon to rise into the air.
As the flame burns it heats the air around it making the air less dense than the cooler air above, the warm air particles rise to the top of the balloon and the balloon rises with the air. Essentially a hot air balloon uses a convection current to stay in the air.
A hot air balloon can stay in the air because the hot air is less dense than cool air. The hot air that is blown into the balloon causes it to rise and a burner is used to heat the air inside of the balloon to keep it floating.
The intense heat of the burner alters the atomic nucleus of the oxygen atom into a synthetic helium atom causing the balloon to rise. The helium atom is less dense than the original oxygen atom.