Other five faces of the solid exchange heat by convection with the surrounding air environment. The fact that the top and bottom faces have the same heat transfer coefficient means that the temperature of the solid is symmetric about a vertical plane that bisects the length of the solid. Similarly, the two sides have identical heat transfer coefficients which create a symmetry plane that bisects the breadth. These planes further subdivide the solid into four quadrants in such a way that the temperature solution in each quadrant is identical. Hence, we need to solve the heat conduction problem in only any one of the quadrants.
Results and Discussion The effects of ultrasound, electric field strength, the time of applying the field and sonication time on a number of E. coli, and energy consumption of the process in mint distillate were investigated. As shown in Table (), the full quadratic model for the data had a significant effect on the reduction of E. coli in the samples of mint distillate. The adjusted determination coefficient, standard error and coefficient of variation (C.V) of the model were equal to 0.9984, 0.049 and 2.39, respectively. According to ANOVA (Table 1-4), with the exception of the electric field strength coefficient* sonication time and the time of applying the electric field * sonication time, other coefficients of the variables in the model
I. Introduction This experiment uses calorimetry to measure the specific heat of a metal. Calorimetry is used to observe and measure heat flow between two substances. The heat flow is measured as it travels from a higher temperature to a lower one. Specific heat is an amount of heat required to raise the temperature of one gram of anything one degree Celsius.
The stereo plug was connected from the sphere to the temperature sensor The hose fitting was then connected to the pressure sensor. The data studio setup button was used to add digital displays for temperature and pressure. A graph of pressure vs. temperature was also added. Three water baths of cold, warm and room temperature water were prepared using the buckets. The sphere was completely submerged in the ice water bath and the data taken with the sensors.
Introduction Heat is the form of energy, thermal energy, which flows between two substances due to their difference in temperature.1 The measurement of heat flow is called Calorimetry and the apparatus used to measure the heat flow (temperature change) for a reacting system is called a calorimeter. The calorimeter is well-insulated device that help to minimize the heat exchange between the system being observed and its surroundings. In this experiment, simple calorimeter, coffer cup calorimeter containing Styrofoam cups is used. Calorimeter contains a thermometer and a stirrer.3 Thermometer is typically inserted in the calorimeter to measure the change in the temperature that results from the reaction. Stirrer is used to keep the contents
The isotherm was recorded by Micromeritics ASAP 2020 analyzer and the physical adsorption of N2 at the temperature of liquid nitrogen (-196oC) with a standard pressure range of 0.05-0.30 P/Po. 2.3 Catalytic Activity Measurement After annealing the catalyst bed, it was cooled to room temperature in the same conditions as we used for reactive calcination. The CO oxidation was analysis by gas chromatogram to measure the activity of the catalyst. The oxidation of CO was carried out to measure the activity of resulting catalyst. 2CO + O2→2CO2 -------------------- (1) The oxidation of CO was carried out under the following reaction conditions: 100mg of catalyst with feed gas consisting of a lean mixture of 2.5 vol.% CO in air and total flow rate is maintained 60 mL/min.
EC treatment of oil wastewater samples has been tested on a laboratory scale and good removal of COD, color, turbidity and dissolved solids at varying operating conditions were obtained. 2. Materials and methods: 2.1 Experimental equipment: An electrochemical reactor shown in figure, having 500 ml with a speed of agitation of 200 rpm with aluminum electrodes in series arrangement connected to a DC power supply ( 1.5 Amp & 6 Volt ) was used to carry out the experiments. The total 4 no of electrodes are used. The % removals of Chemical Oxidation Demand (COD) were calculated by changing different parameters: pH, electrode gap and operation time.
Thermoelectric coolers operate by the Peltier effect (which also goes by name thermoelectric effect). The device has two sides, and when DC current flows through the device, it brings heat from one side to the other, so that one side gets cooler while the other gets hotter. The "hot" side is attached to a heat sink so that it remains at ambient temperature, while the cool side goes below room temperature. In some applications, multiple coolers can be cascaded together for lower temperature. 2 | Page Chapter-1.1: INTRODUCTION Thermoelectric cooling uses the Peltier effect to create a heat flux between the junction of
We were asked to graph pressure and the inverse of volume because the graph of pressure and inverse volume is inversely related to the graph of pressure and volume. The graph allows a visual representation of what being inversely related conveys. The mathematical relationship that exists between volume and temperature when pressure and quantity are held constant is that volume is directly proportional to temperature. This relationship is known as Charles 's Law. (V1 / T1) = (V2 / T2).
An irreversible, spontaneous and homogeneous reaction was researched at an ambient temperature of 22.7°C. The specific reaction is given in Equation 1. CH_3 COOCH_2 CH_3+ NaOH →CH_3 COONa+CH_3 CH_2 OH (1) It is necessary to determine the reaction kinetics for the reaction in Equation 1. Reaction kinetics is an unavoidable stepping stone needed for reactor design and optimising these reactors to their full potential. It is a measurement of how quickly a reaction occurs.