Alfredo+Gonzalez+-+How+does+temperature+and+pressure+affect+a+gas?

How does temperature and pressure affect a gas?

When temperature is low the gas molecules move at an average speed. When temperature is high the gas molecules move at a faster rate than when the temperature is low. Temperature can affect gas because for example when temperature is hot, it can heat up water that is a liquid and make it into water vapor which is a gas.

Pressure affects gas by adding force to the gas molecules which makes them move faster in an area to expand. Pressure affects gas like for example when u put air inside a tire it expands because the gas molecules are moving because of the pressure.

Gases that contain the volume at the same temperature and pressure will have the equal amount of molecules. So for example if u have the gases helium and krypton that have the same volume at the same temperature and pressure, they will have number of molecules in that particular area.

Robert Boyle's Law: Robert Boyle saw that when a gas is pushed into a smaller volume, it exerts greater pressure. Like for example when gas is put in a container and the volume decreases, the molecules exert pressure as they bounce off walls of the container.

Jacques Charles Laws: Jacques Charles saw that when a gas is heated, it exerts greater pressure, and will expand if it can. The molecules move faster when gas is heated. For example if u put gas inside a container and heat it up the gas molecules will move faster and collide more violently.

Resources:

Cooper, Christopher. MATTER. EYEWITNESS SCIENCE. United States by DK Publishing, Inc., NY: Dorling Kindersley Limited, 1992. Print.

Benson, Tom. Gas Pressure. NASA, n.d. Web. 13 Jan. 2011. .

Ehrenberg, Werner. "Gas." Encyclopedia Americana. Grolier Online. 2011. http://ea.grolier.com/article?id=0171550-00&product_id=ea (accessed February 3, 2011).