Enthalpy

In our experiment, to look deeper into exothermic reactions, we first had to create our own calorimeter. We did this using 3 separate 8 ounce Styrofoam cups, one for each compound. We then used cardboard to create a lid for each cup and taped it to the sides so the seal would be as tight as we could make it. We also needed a 150mL beaker to measure out the 50 mL of distilled water that we used in each trial to dissolve each compound in. To weigh out each compound we also needed an electronic…

Results and Discussion 3.1 Composition of wheat starch granules The composition of starches and their separated A- and B- granules of two varieties are shown in Table 1. Amylose content of starches lies between 16.96 -24.69. The B-granules of the both varieties showed the lower value of amylose content while A- granules attributed to the high amylopectin to amylose ratio. Swelling power results the ability of starch to hydrate in specific cooking and heating process (90 °C/ 30 min.). The…

Abstract This lab report focuses on the two experiments on pressure systems conducted, the Marcet boiler and Boyle’s law. The aim of this lab is to investigate in pressure-temperature relationship, Boyle’s law, as well as steam quality. The results of this experiment support both relationship, as well as successfully providing a value for steam quality. For the Marcet boiler experiment, it was found that the higher the system pressure, the higher the saturated temperature. For the Boyle’s law…

A fuel is any material that can be made to react with other substances so that it releases chemical energy as heat. Fuels can range from solid forms such as coal, liquid forms such as LPG & gas forms such as propane (you, 2017). Most of the fuels used are fossil fuels. Over 81% of America’s fuels are fossil fuels, these include fuels such as oil, coal and natural gas. Fossil fuels are fuels that are extracted from the earth, this means that they are a limited resource. This creates the need for…

Biology 201 B1 Assignment #2 A four question analysis on "The myosin-interacting protein SMYD1 is essential for sarcomere organization" by Just et al. (2011) 1.) Wild-type Fla Mutant (SMYD-deficient) In the current study, the authors used a zebra fish mutant known as Flatline (fla). This mutant contains a nonsense mutation within the SMYD1 gene, consequently, these mutants show disturbed sarcomere assembly. The authors…

Tables gives the enthalpy change for three reactions Na(s) + ½Cl2(g)  NaCl -411.2 H2(g) + 1/2O2(g)  H2O -242.0 CH4(g) + 2O2(g)  CO2(g) + -1461,9 Al three of these reactions are exothermics with a considerable amount of energy being released. Just as a stone tends…

Heat conduction mechanism represents the energy loss at the particle surface due to the collisions with the surrounding gas molecules. There is no simple theory to explain the cooling mechanism of the particles. During the laser pulse, the particle achieves the peak temperature and emit thermal signal. After the laser pulse duration, the particle starts to cool down. The cooling of the particles is characterized by a decay function. The decay of LII signal provides information about the primary…

3.7. Equilibrium isotherms Langmuir isotherm proposed by Langmuir, (1918) with some limitations Dąbrowski, (2001) expressed as: (4) Where qm (mg g–1) is the maximum amount of the metal ion per unit weight of adsorbent, ‘qe’ is equilibrium adsorption capacity (mg g–1), ‘Ce’ is the equilibrium concentration of the adsorbate (mg L–1), and b is a constant which reveals the affinity of binding sites (L mg-1). From the plots between (Ce/qe ) and Ce the slope (1/qm ) and the intercept…

naturally. It is said that when a system experiences a change to its initial state while moving to its final state, the system has undergone some type of a thermodynamic process. During this process, changes in the systems pressure, temperature, volume, enthalpy, etc. can occur. It is because of the discovery of the second law of thermodynamics that we are able to classify these processes as…

Also it gives the idea about the factors which controls the rate of a reaction. Practically in order for a reaction to occur, the reaction must be thermodynamically and kinetically favored. The Thermodynamic factors which control reactions are enthalpy, entropy and the temperature. The kinetic factors which controls the rate of reaction are, the concentration of reactants, the reaction mechanism, the energy barrier required to be overcome i.e. its activation energy, and temperature Rate of a…