Graphite carbon electrode was polished to a mirror-like surface with 1.0, 0.3 and 0.05 micron α-alumina powder in sequence and washed in supersonic for one minute before use. 3. RESULTS AND DISCUSSION 3.1 Cyclic voltammetric studies of copper-phen
Research Question: How does the reactivity of a Metal affect the enthalpy change for a reaction? Aim: To investigate how reactivity’s of various metals (Fe, Mg, Zn, Cu and Mn) affect the enthalpy change of the solution when it reacts with 25cm3 Copper II Sulphate. Theory: Specific heat capacity is the amount of energy needed to raise the temperature of one gram of a substance by 1 degree Celsius. Different materials absorb different amount of heat when their temperature rises by one degree Celsius. Therefore, every material has a different specific heat capacity.
Iron phostate, also extensively known as FePO4, was studied through a special type of transformation process known as neutron powder diffraction. The transformation process uses a temperature that ranges from 297K to 1073K. As long as it is within the low temperature range, it is defined as the ‘α’ phase. Otherwise, if it is within the high temperature range, it is defined as the ‘β’ phase. The iron phostate will change its tetrahedral form in the low temperature range to its octahedral form in high temperature range.
Calculate the following items: (a) The percentage of excess carbon furnished, based on the principal reaction. (b) The percentage conversion of Fe2O3 to Fe. (c) The pounds of carbon used up and the pounds of CO produced per ton of Fe2O3 charged. (d) What is the selectivity in this process (of Fe with respect to FeO)? Solution Setting up the mole equivalent for the principal reaction as follows; Fe_2 O_3 + 3C → 2Fe + 3CO Initial mass: 1 100 lb 300 lb - - Mass at time, t: - - 600 lb Molar mass: 160 12 56 Number of moles: 6.875 25.00 10.714 Mole equivalent: 6.875 8.333 5.357 In addition, setting up the mole equivalent for the undesired side reaction as follows; Fe_2 O_3 + C → 2FeO + CO Initial mass: 1 100 lb 300 lb - - Mass at time, t: - - 91.5 lb Molar mass: 160 12 72 Number of moles: 6.875 25.00
The molar mass of a volatile liquid can be obtained by measuring the temperature, pressure, mass, and volume in a gaseous state. The equation used to determine the molar mass is derived from the Ideal Gas Law equation. The objective of this experiment aims to determine the molecular mass of a
Titanium and its alloys react with interstitial elements such as oxygen, nitrogen, and hydrogen, below their respective melting points. In its reactions with other elements, titanium may form solid solutions and compounds with metallic, covalent or ionic bonding. Major alloying elements, added to improve mechanical properties and corrosion resistance, are classified as α-stabilizer, or β-stabilizers.The alloying elements are generally classified into three categories as α-stabilizer, β-stabilizer and neutral. The α-stabilizing elements extend the α phase field to higher temperatures, while β-stabilizing elements shift the β phase field to lower temperatures.
The quenching experiments may give further information about the binding ability of NSs with Cys. Subsequently, for quenching measurements, the appropriate volume of Bi2S3 NSs and a series of Cys standard solutions were added to the 10 ml test tube, diluted by water and homogenized for determination. It was reported that the fluorescence intensity was quenched by the addition of Cys solution. The detection spectra were obtained in the range of 350–650 nm with the excitation wavelength of 350
There are several impacts that should be noted about quenching a material. First, the impact on microstructure can wholly depend on the quenching process and how long it was held at certain temperatures. The percentage carbon in the steel can also impact on the time needed to obtain different forms of the steel. At 0.8% carbon, there is 100% pearlite in the microstructure. In terms of isothermal transformation, the steels heated to above 723°C
Materials and methods 2.1. General 1H (400MHz), 13C(100MHz) (Bruker-400) and 2D NMR (500MHz) spectra including 1H= H correlated spectroscopy (COSY), heteronuclear single quantum coherence (HSQC), heteronuclear multiple bond correlation (HMBC) were recorded in
Chemistry Exploration Topic: determining the activation energy of a chemical reaction Research Question: What effect does temperature of the chemical reaction have on the activation energy ? ICT: Microsoft Word Autograph Microsoft Excel Introduction This experiment is designed to help in estimating the activation energy of the rate-limiting step in the acid catalyzed reaction of acetone with iodine. This is achieved by measuring the reaction rates at different reaction temperatures over the experiment. Once the raw data is obtained, I will analyze the data with the help of an Arrhenius plot. This is a tool used in determining the activation energy of chemical reactions.