Thursday, October 27, 2011

Chemistry Lab Report

The amount of gas and water in the 125 mL flask was never changed in order to keep all results accurate except for the 350 mL and 700 mL flasks when ice was added, the new amount was 400 mL and 800 mL, dependent of the beaker. Looking through the data an explanation that as more pressure was applied the hotter the temperature was. This is explained by using concepts of molecular velocity and collisions of molecules because a measurement of energy of molecules is temperature and pressure being related to force of collisions of the molecules. As temperature and pressure increase, so do the velocity of the molecules and their collision force. The data shows that this explanation can also be in an equation! Since temperature directly affects pressure, pressure can be divided by temperature to end up with the constant value (P/T=k pressure divided by temperature(degrees Kelvin)= a constant value). Seeing this, saying that doubling temperature would do the same to the pressure.

Monday, October 17, 2011

100 Greatest Discoveries: Chemistry Summary

In 100 Greatest Discoveries: Chemistry. Bill Nye meets with several different chemists who also talk about chemists that have died who discovered many great things. For example, Joesph Priestley initiated the study of chemistry in 1770 with the discovery of oxygen,and Henri Becquerel with the discovery of radioactivity, or Ernest Rutherford with the discovery of the Atom. The video teaches of the discoveries of old and new one's being developed into new things today like nanotechnology. At the beginning you learn about the periodic table of elements. Then you move on to the discovery of Bucky Balls and Bucky Tubes the strongest material when broken down into many fibers and put together.