Chemical Synthesis Essay

Throughout today’s society, media contributes to almost everyone’s daily life. From informative news channels to comical television shows, media proves to be effective in advertisement, releasing messages and informing the audience. Although media proves to be wildly effective in advertising, releasing messages and informing the audience, periodically destructive and misleading messages are provided to the audience and directly influencing women. Cultural critics widely agree that media tends to negatively influence women and all the critics point to research which supports the belief that women are portrayed as subordinate to men, having no

It has recently been brought to my attention that our school is looking to adopt a sustainable menu into our meal program and I would like to give my viewpoint on the matter. As one many students here at Oxford Academy this change will affect me directly. Although people may at first oppose this conversion I think if we are able to overcome the first obstacles, this change would bring a great positive impact to the environment and the health of our students.

2. ALTERNATIVE FUELS - ETHANOL & THE ALKANOLS 3. REDOX CHEMISTRY & BATTERIES 4. RADIOACTIVITY & ITS USES

Purpose: The purpose of this experiment is to observe a variety of chemical reactions and to identify patterns in the conversion of reactants into products.

The activity was separated into 4 parts concerning 5 different groups of elements. In the first part, we had identified the physical state, the color, and the solubility in water of the Carbonates of I-A and II-A Elements. The elements Na2 Co3, Li2 CO3, Mg CO3, Ca CO3 had a powdery appearance while Ba CO3 had a ball shape appearance and K2 CO3 had a wet, granule appearance. All of the elements stated have a white color. The elements Na2 Co3, Li2 CO3, K2 CO3 were soluble to water while Mg CO3 Ca CO3 Ba CO3 were not. For the second part, we had identified the physical state and the color of some of the Group IV-A Elements. Carbon had a powdery appearance and it is black in color. Silicon had a ball-shaped appearance and it is countable and it is pinkish-white in color.

The purpose of this experiment was to observe combustion, oxidation-reaction, and catalyzed decomposition reactions as they work to create rockets that run on a fuel of the reaction H2+1/2O2→H2O2. Instead of being in partners, the partners were put into groups of 4 to create an experiment that tested rocket performance by manipulating a variable such as the order of the collection of gases or amounts of fuel. It was evident during the lab that the reaction of hydrochloric acid and mossy zinc [Zn (s) + 2 HCL (aq) → ZnCl2 (aq) + H2 (g)] reacted much faster than the reaction with the yeast and hydrogen peroxide [2H2O2 (aq) →catalyze 2H2O (l) + O2 (g)]. Both reaction continuously produced gas just at different rates. It can be inferred that the reactivity of the stoichiometric reaction was higher relative to the catalytic reaction.

(Co, Fe) doped (La, Ca) based chromites - (La0.8Ca0.2)(Cr0.9-xCo0.1Fex)O3 The transition metal doped perovskite compound, (La0.8Ca0.2) (Cr0.9-xCo0.1Fex) O3 (x=0.03, 0.06, 0.09, 0.12) was synthesized by mixing the powders of lanthanum oxide (La2O3, 99.99%), chromium oxide (Cr2O3, 99.99%), cobalt oxide (Co3O4, 99.99%), ferric oxide (Fe2O3, 99.99%) and calcium carbonate (CaCO¬3, 99.99%) in stoichiometric ratio according to the following equation. 0.4La2O3 + 0.2CaCO3 + ((0.9-x))/2Cr2O3 + 0.1/3Co3O4 + x/2Fe2O3 → (La0.8Ca0.2)(Cr0.9-xCo0.1Fex)O3 +CO2

Keywords: Glasses; chemical synthesis; infrared spectroscopy; photoelectron spectroscopy; electrical and optical properties. Introduction:

The Product Life Cycle of the technology of the bioresorbables, a relatively new line in a mature technology

By analysing the results collected in the experiment, the overall outcomes suggests that Manganese Oxide, Copper Oxide and Lead Oxide are the 3 Oxides that decomposed Hydrogen Peroxide leading to large productions of Oxygen. Starting with an initial O2 concentration of an average 20.50%, the final concentrations of O2 after 120 seconds were 47.73% for Copper Oxide, 46.5% for Manganese Oxide and 46.37% for Lead Oxide, showing that they performed quite well as catalysts. Although, all three of them showed a similar amount O2 production, Manganese IV Oxide was the quickest to start working and showed a considerable O2 concentration relatively quickly. Lead and Copper Oxides were not very quick at the offset but caught up with Manganese IV Oxide

With climate change and pollution rapidly developing international issues, the demand for alternative sources of fuel has grown exponentially in recent years. Due to these developments, Nocera’s invention was initially met with wide disappointment following its highly-publicized release due to its sole capability of creating gaseous fuel. The Harvard

Fig. 9 shows the reaction pathway of DME/air, n-butane/air and 50%DME50%n-butane/air mixture, using Aramco2.0 model at equivalence ratio of 0.5, temperature of 700 K and pressure of 10 atm. A snapshot of the reaction flux of 15% fuel consumption is provided.

Due to the extreme complexity of the underlying reactions, the kinetics of pyrolysis are often aggressively simplified to involve a limited number of reactions with products expressed as gas, tar, or char.

The advent of stringent emission norms and depletion of fossil fuel resources led the engineers to work out new combustion technologies to substantially reduce harmful emission and to improve the overall efficiency of an IC Engine. Factors to be considered while designing a new combustion process are higher compression ratio, lean homogeneous air fuel mixture and complete combustion and instantaneous combustion, which leads to Homogeneous Charge Compression Ignition (HCCI). HCCI is a clean and efficient combustion process. In this paper an attempt is made to experimentally analyze the performance and emission characteristics of HCCI compression process taking place in Premixed Charge Compression Ignition (PCCI) mode assisted with Pilot Injection as combustion initiator.

Due to the increasing pollution, modern vehicles must meet the increasing emission regulation on the pollutants such as soot, NOx, unburned hydrocarbons, particulate matter and carbon monoxides. Initially, spark ignition engines have been used which has a flame propagating mechanism and the combustion can be controlled by varying ignition timing. The emissions of soot are lower when compared with the diesel engines as the mixture used for the combustion is pre-mixed. At partial load conditions the SI engine has low efficiency which is a major drawback. In the compression ignition (CI) engines the compression ratio is higher than the SI engines. In CI engines the rate of combustion is limited as a part of the fuel mixes well with air and burns fast and for the other