Essays on Physical chemistry

Cathode ray tube is used for producing images, when an electron beam hits the surface made out of a phosphorescent, and the cathode ray tube is basically a vacuum tube. An example of a cathode ray tube is a computer desktop and the picture tubes in television are similar to the cathode ray tube in…

Another postulate of the kinetic molecular theory is that gas particles are always in motion, like the other states of matter. But they are different in that they undergo random translational movement. In solids, the particles mainly experience vibrational motion and in liquids they mainly vibrate and rotate, with some translational motion. Gas particles move…

CHEMISTRY (Theory) Time allowed : 3 hours General Instructions: (i) All questions are compulsory. Maximum Marks : 70 (ii) Marks for each question are indicated against it. (iii) Question numbers 1 to 8 are very short-answer questions and carry 1 mark each. (iv) Question numbers 9 to 18 are short-answer questions and carry 2 marks…

Introduction In this lab I observed the burning of a candle very closely. I found out that the candle needs oxygen to burn, that it produces carbon dioxide similar to the way that my body produces carbon dioxide, and that a candle produces water as a second waste product. I learned that if I hold…

To set the ammonia fountain experiment up I made sure I had all the materials the lab required me to have which was: a Florence Flask, a 600 mL beaker, a Mohr pipet, distilled and tap water, a polyethylene wash bottle, a phenolphthalein indicator, concentrated ammonium hydroxide, sand, a heating mantle, a ring stand, clamps,…

Introduction The purpose of this lab is to create two material samples through the process of powder metallurgy. After these samples have been manufactured completely through this process then they are evaluated under a microscope. One sample was sintered, and the other one was in its original compacted state for a comparison of how sintering…

 Describe what is necessary for a substance to be a conductor Of electricity. In order for a substance to be a good conductor of electricity, there must be charged particles in the substance, ions or electrons. These particles must be free to move within the substance. Form a hypothesis as to whether distilled water is…

The study of the nature of light is an important research area in modern physics. Many, including the theoretical physicist Albert Einstein, have contributed to theories involving light. Of these, the wave-particle duality is arguably the most strange and noteworthy concept in the field. Throughout history, some physicists have argued that light behaves as a…

Objective: Separate and purify acetanilide from a mixture by recrystallization. Compare the melting points of crude and recrystallized acetanilide. Introduction : The most common method of purifying solid organic compounds is by recrystallization. In this technique, an impure solid compound is dissolved in a solvent and then allowed to slowly crystallize out as the solution…

Photovoltaic cells are solid state devices that convert light directly into electricity. Photovoltaic literally means “light electricity.” These devices can be commonly found providing power for small scale devices such as calculators, watches, and small radios. However, they are not limited to small scale systems. They are also used to power satellites, communications equipment, houses…