Tuesday, September 21, 2010

Gases and Climate Change

Combustion Demo:
If the alcohol evaporates well inside the bottle, then when it is ignited flame will light up inside the bottle because gas is flammable.
The bottle was coated well in the rubbing alcohol. Blue flame shot out of the bottle immediately when the lighter touched it. The momentum carried the bottle almost all the way to the wall.
Earth's greenhouse effect allows life to be sustained. The natural greenhouse effect goes like this: Greenhouse gases operate like a jar in the way that it partially contains the sun's heat energy and then lets it go into space. Thus allowing there to be life on Earth. Humanity is causing and creating more greenhouse gases to emanate which is causing temperatures to rise, resulting in climate change. This is also causing several problems such as the melting of glaciers, rising sea levels, suffering corals, etc.

CO2 Demo:

If the vinegar-baking soda mixture evaporates into gas, then it will snuff out the candle flame because it has formed carbon-dioxide gas which extinguishes flame.
The vinegar and baking soda bubbled and fizzed on contact. Carbon dioxide gas produced from the graduated cylinder blew out the flame. In order for there to be fire, there must be oxygen. When the carbon dioxide gas goes near the flame it removes the oxygen, so then it
removes the flame as well.
Carbon dioxide is like one of those things that you can't live with or without.
It is needed for plants and is a natural component, but humans are now affecting the natural carbon cycle. Too much of anything is not good, no matter what it is. A lot of carbon dioxide is being released from the things humans do plus the normal amount and it adds up.

Hydrogen Gas Demo:

If the hydrogen evaporates into gas, then it will ignite because of the flammable gas.
When the zinc hit the hydrochloric acid it started sizzling. It immediately evaporated and the gas escaping at the top could be seen. All
the zinc evaporated and when it was ignited the gas lit into flames that soon died down. When the mixture was lit again it lit up but died down
very quickly. The beaker was still considerably warm even after the fire dissipated.
Hydrogen can be produced through steam reformations where carbon dioxide is released. It can also form through a process involving

Air pressure demo:
If the can is filled with water vapor and placed into the ice water tub, then it will
Water vapor rose from the can in wisps. The can was placed with the open side up into the water. There was not really a noticeable chemical
If the can is filled with water vapor and placed invertedly into the ice water tub, then it will be crushed because of the pressure and gas trapped in the can.
Bubbles formed when the can was being heated. Once the can was placed in the water it was crushed and when it was lifted water poured
out of the hole. A vacuum was created when the can was flipped and the air pressure was changed. The air needed to fill up the space.
The atmosphere circulation is controlled by air pressure. Alterations to the air pressure can impact the weather. Over the years air pressure has risen considerably which has and will lead to less cold, rainier, and windier winters in Northwest Europe. In southern Europe, however, winters will be much drier. Canada and the US can expect milder winters. Leaving Greenland with colder winters. These changes are not necessarily caused by combustion/greenhouse gases. Natural differences in the climate may be to blame this time.