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The Ideal Gas Law & Hot Air Balloons

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by

Luke Robson

on 7 April 2013

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Transcript of The Ideal Gas Law & Hot Air Balloons

By: Luke Robson The Ideal Gas Law & Hot Air Balloons Up in the Clouds The Ideal Gas Law relates the volume, temperature, and pressure of a gas. This law shows that when a gas is heated, the volume of that gas will expand. If the gas is cooled, it will contract. The Ideal Gas Law Hot air balloons sit on the ground until the operator heats the gas inside of them with a torch. This torch causes the air inside to expand, making it less dense. The expanding air causes the balloon to inflate. Beginning to Fly Once the balloon has inflated, the air inside of the balloon is less dense than the air outside of it. This change in density allows the balloon to float off into the air as the outside air pushes the low-density air upwards. Taking Off The effects of the ideal gas law allow us to enjoy items like hot air balloons. It explains how something as simple as fire can allow us to fly up into the air with relative ease. Hot air balloons begin on the ground, deflated like this one. How do we get them to fly up into the air? To understand this process one must understand the gas laws at work.
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