The Sci Guys: Science at Home - SE2 - EP11: Gay-Lussac's Law of Ideal Gases

stand by

guys

gay

lussac

law welcome to sigh

guys

I'm Ryan and I'm Adam and today we're going to do the boy

lussac

ideal

gas law you know Adam your girl I'm not Adam I'm confused gay lussac law states that the The temperature and pressure of an

ideal

gas are directly proportional. This means that as the temperature increases, the pressure increases and vice versa. The equipment you will need in this episode includes a couple of candles, a glass or glass, some water and a plate. shallow hold it with food coloring and a butane lighter or matches, although we are not dealing with anything particularly dangerous in this episode, it is always a good idea to wear an apron or lab coat to protect ourselves from spills and splashes, as well as our viewers younger.

Always make sure you have adult supervision whenever you're dealing with fire, so what we're going to do first is fill our shallow dish with an inch or two of water and then we're going to add a little bit of food coloring to do that. easier to see, the next step in our experiment is to take the two candles, place them in the center of the water and light them with a butane lighter. For the final step, take your beaker or large glass and place it over the candles after a short while after having our glass over our candles, you will notice that the candle flames will get smaller and smaller until they go out.

If you look closely, you will see that the water level under our glass begins to rise as the candles go out. The water level will continue to rise for a short time after the candle has been completely extinguished. You will notice that the water under the glass is much higher than the water in the shallow dish. Let's do this experiment a little closer. Gay Lussac's law states that when a fixed quantity or mass of an ideal gas is maintained in a constant volume and in a closed system then its temperature and pressure are directly proportional. What this means is that when the temperature of a gas increases its pressure increases or when its temperature decreases its pressure decreases as As we mentioned in our last episode, an ideal gas is a theoretical gas composed of a set of particles that move randomly and do not interact.

Under normal conditions, many

gases

, such as oxygen, hydrogen and some heavier

gases

, such as carbon dioxide, will behave like an ideal gas, this means that they follow the gas laws such as Gay Lussac's law in our experiment. our beaker is full of gaseous air molecules the energy of our flames is transferred to the air molecules exciting them raising their temperature when the air molecules in our beak get excited they try to move further apart but because our beaker does not will expand like a balloon, the volume of space our air molecules can occupy is limited as they try to expand in volume, the air molecules pressing harder and harder against the walls of our beaker and the water at its base.

The increase in air pressure beneath our glass causes the water level beneath it to be pushed lower than the water level outside of it. The higher the temperature or the more energy the air molecules get, the more pressure will be created under our glass as the candle flames burn. They use part of the oxygen contained in the glass for combustion. The products of this reaction are carbon dioxide gas and water vapor. As more and more hot gases of carbon dioxide and water vapor are produced, they fill the top of our glass, forcing oxygen into our glass. beaker in which the candles must burn more and more until the candles go out once the flame goes out, the air molecules under our glass begin to cool, lower the temperature and lose their excitation, this causes the amount of pressure that our air molecules exert on the sides of our glass and the water at its base fall as the pressure falls the air beneath our glass wants to be equal to the pressure outside our glass this need for balance causes a pull on the sides of the glass and the water at its base Because it is much easier to get water into our glass than to collapse the sides of our glass, the water from our shallow container is forced into our glass raising the level of the water below of the glass and equalizing its pressure by changing the temperature beneath our glass, we can clearly see the directly proportional relationship between the temperature and pressure of an ideal gas.

This relationship is known as gay Lussac's law, which is a fairly famous ax law of ideal gases. Thanks for watching, if you enjoyed this episode let us know in the comments below and subscribe. future episodes and be sure to like us on Facebook and follow us on Twitter. If you have any questions related to this episode or about

science

in general, please let us know in the comments below or message us on Facebook and we will try to help you as soon as possible. best possible, thanks for watching bye, hello, you're not Adam, you're Theresa, you can't fool me.

Good job, you got it here at SCI. The kids were always curious to know how the experiments turn out, so if you do these experiments at

home

, share a video or photo of them with us on our Facebook or Google+ page, but always remember to ask your parents for permission before sharing anything. photo or video.