Exothermic reaction

at 3 distinct locations, the meta, para or ortho locations, where the substitution takes place. Depending upon where the substitution takes place, the electron density changes, resulting in considerably different reactivity differences1. The reaction used methyl benzoate and a mixture of nitric and sulfuric…

words “poly” which means many and “mer” which means parts. Polymers are substances which have large number of repeating structural units repeated in the same type of linkage. The chemistry that deals about polymers is called polymer chemistry and the reaction is called as polymerization. Polymer chemistry have a wide range of application in day to day life and the research and recent advanced in this field are both industrially and academically notable and increasing day by day . In this review…

behavior of Mg-Zn-RE and Mg-Zn-RE-xCa alloys. The results (Fig. 1) revealed that the corrosion potential, Ecorr of Mg-Zn-RE alloy was -1841 mV, which was more negative compared with the Mg-Zn-RE-0.5Ca. This phenomenon indicates that the cathodic reaction was more difficult in quaternary alloys compared to the ternary…

How does the change in hydrochloric acid concentration affect the rate of reaction between sodium thiosulfate (Na2S2O3(aq)) and hydrochloric acid (HCL(aq))? Background to the Research question Collision Theory Back in 1916, scientists William Lewis and Max Trautz proposed the collision theory, which qualitatively explains how chemical reactions take place and why reaction rates change for various reactions. Chemical reactions involve collisions amongst reactant particles or atoms to form…

burn in oxygen to form carbon-di-oxide and water with the release of significant amount of energy. This process is known as complete combustion. Since, this reaction causes release in energy to the atmosphere and decrease in energy of the alcohol, it can be characterized as an exothermic reaction. The amount of energy released by this reaction depends primarily on the number of carbon atoms in the alcohol. The amount of energy released by the complete combustion of a compound per mol is defined…

Human factors to be considered include ergonomics, fit, ground reaction force, weight, durability, stability, and cushioning. Ergonomics dictates good posture. In order to maintain good posture, referred to as 'neutral posture ', the muscles of the body must be in balance to support an aligned spine13. The design of this shoe must take ergonomics, perception, quality control, and biomechanics into account. Fashion has been a deciding factor in the shoe industry over the last decade.14 For…

Its derivatives, acyl halides, anhydrides, esters, amides and nitriles, are used in making target products such as flavoring agents, internal plasticizers, pesticides, dyes, textile treatment agents, fungicides, and pharmaceuticals through further reactions of substitution, catalytic reduction, metal hydride reduction, diborane reduction, ketone formation with organometallic reagents, electrophile bonding at oxygen, and condensation (Werpy et al, 2004). CHAPTER 2 PROCESS…

Enzymes speed up the rates of most biochemical reactions by helping reactants interact with each other. Since enzymes are highly specific for a specific reaction, they only catalyze one or a few types of reaction. One of important enzymes in human body and many other animals is amylase that hydrolyzes starch, a major part of human diet for many people in the world. There is a variety…

Concentration on Reaction Rates and Pressure Background - While conducting the Enzyme Lab, students used enzymes as catalysts in order to speed up the reaction processes involved in several tests. Enzymes are substances produced by living organisms that act as a catalyst, while a catalyst is a substance that increases the rate of the chemical reaction. Furthermore, varying amounts of pH and enzymes were added to the mixture in order to determine the substance’s rate of reaction. When the…

Purpose To investigate the effect of temperature on the rate of the thiosulphate reaction. Hypothesis If the temperature increases, then the rate of the thiosulphate reaction will also increase. Variables Independent variable: Temperature change in each experiment, which will be varied by increasing the temperature by 10°C each time. Dependent Variable: Rate of reaction, which will be measured by measuring the time taken for the cross to not be visible. Constants: Concentration of HCl and…