The plots for GAT, AGAT and DAGAT were straight lines, and the standard deviations were almost 1 for each, which indicate the independency of the thermal degradation of the energetic materials at various heating rates. However, the standard deviation for AZT was slightly less than that of the others. (27), (33), (40) The slopes of the lines equal for each material -Ea /R (2) through transposing Eq (2) The activation energy was found from the following equation E = 8.314 * slope (3) The activation energy values were later used for computing the pre-exponential factors (A) by equation (1). In the meantime, activation energies (Ea) for these energetic compounds were calculated by the Ozawa method. The Ozawa equation according to ASTM E698 is equal to the following…
Experimental Conditions It is important to note that in our lab experiment we used galena, PbS, with 170 – 200 mesh (i.e. there were 170 to 200 wires per inch of sieve used to sort out the galena crystals). This means our diameter range of our particle size was 75-90 μm. Table 1:Experimental Conditions for PbS leaching FeCl3·6H2O (g) to be added is found by: The weight of FeCl3·6H2O (g) added in our experiment was slightly larger than the theoretical amount of FeCl3·6H2O needed, as can be seen…
temperature controlled room and turn up the heat. Since crickets like all other insects, cold-blooded, they take on the temperature of their surroundings. Cricket chirping falls under an equation called the Arrhenius equation which is that the higher the temperature, the faster a given chemical reaction can occur. The Arrhenius equation, in a deeper explanation, says that at higher temperatures, the probability of two…
were a way for professors around the world to teach their classes online for free. Like most others, my thoughts on online education mostly revolved around second-rate scams and suspicious for-profit institutions (I’m looking at you, DeVry). However, curiosity got ahold of me, and I quickly signed up for several courses. As it turned out, these courses were structured similarly to college classes; they consisted of weekly video lectures and a forum for collaboration between the tens…
M is the resultant internal bending moment calculated about the neutral axis of the cross section, y in this case is the thickness of the beam divided by two, and I is the moment of inertia of the cross-sectional area about the neutral axis [4]. The final equation is, Equation 5 is utilized to calculate the deflection δ of the cantilevered beam at x = L when a load is applied at a point. Since we would not applying a specific load but knowing the displacement we solved this equation for P. There…
This is where they began to know a little about each other and how they all got in to Princeton. After meeting and taking to one another Nash starts to walk to his dorm. As John got to his dorm, he looks around and decides to move his desk to the window. Then a guy name Charles Herman walks into the dorm and introduce himself as his roommate. Charles came in the dorm like he was some kind of a drunk person but he was not drunk. After that, John started to write mathematical equation on his…
A rate law is an equation used to determine how much the concentrations of solutions will change as times goes on. In this experiment, the rate changed based on the five degree Celsius temperature change and concentration change in three different reactions. In this lab, temperature had a drastic effect on the rate of the reaction. In the third trial, increasing the temperature only by five degrees Celsius increased the rate of reaction by a substantial amount. This was determined because less…
The reaction between Propanone and iodine under acidic condition Aims To find the order of reaction with respect to propanone, iodine and sulfuric acid, thus proposing a rate equation. Find rate constant at various temperature and with the use of the Arrhenius equation, find the activation enthalpy of the reaction. General Method {For step by step guide of the experiment see preparation page} By using known concentration of aqueous iodine solution (0.000 moldm-3, 0.005 mol dm-3, 0.015…
the results, where the natural log of the molarity was plotted against time and the trendline was linear, with the equation of ln(M) = 0.0016t + 0.1434. This is because…
deduce the equation landing position of the ball thrown by the robotic arm stand. We must create the equations in terms of the radius, height, arm rotation speed, and release angle. The equations must be made with those variables because, those variables are what can change where the ball will land in the cup, and will make the equation more useful to the client. To make sure the equation will remain accurate we have to keep track of all the units throughout the process. Knowing that all…