Heat transfer

measurements, read through the instructions below and make a neat table in which to record all the numerical data. Using tongs put a clean crucible on the hotplate. Heat the crucible for approximately 5 minutes. Turn off the hotplate. Carefully remove the crucible to a piece of wire gauze and allow the crucible to cool for one minute. Transfer the crucible to a desiccator and allow to cool for approximately 5 minutes or until cooled to room temp. Weigh the crucible and record the mass to the…

This experiment’s aim was to find the alcohol with the highest energy output when burnt using specific heat capacity of calorimeters. This data gathered only partially supported the hypotheses stated. There is an apparent trend between the heat energy of the alcohols and the amount of carbon atoms in the alcohols in the graphs shown. The first experiment (first graph) shows the results of the tests with a controlled calorimeter height of 20 centimeters. This means that the calorimeter, rather…

1. Heat water in a pan or beaker until it is boiling vigorously. 2. While you are waiting for the water to boil, measure the mass of the metal with your scale. Remember to report your answer to one more decimal place than what is marked off by the scale. 3. Once the water on the stove is boiling, drop the metal into the pot and let it sit there for about 5 minutes. This will heat the metal to the temperature of the boiling water (100.0°C). 4. While the metal is heating, nest one Styrofoam…

will be illustrated as following. Reducing cooling energy consumption will be emphasized in designing the new house. The original orientation (315 degrees with living room faces south-west) resulted in excessive heat gain during summer, especially in the afternoon, and insufficient heat gain during winter. Thus, changing the orientation to 135 degrees enables most openings of the house to face northern and eastern side, which contributes to improving energy performance of the house. The…

user of heat to provide energy. It comes from the word solar and thermal, which means sun and heat respectively. They are able to incorporate solar radiation’s heating component to a fluid, which is then used as…

The Mpemba Effect The Mpemba effect is a rather unusual physical phenomenon where hot water freezes faster than cold water, under certain conditions. Intuitively, this doesn’t make any sense. How could water of higher temperature reach freezing temperature quicker than water of colder temperature? Water freezes when it’s molecules lose energy and slow down enough to stick together, forming ice. The molecules of water of high temperature have more energy the molecules in the colder water. So,…

graphs, cref{fig:Graph-Enthalpy-Jun2} and cref{fig:Graph-Enthalpy-Jun3}. The change in enthalpy helps in understanding the amount of heat energy evolved from the heat exchange process whereas change in entropy helps in understanding the amount of energy lost due to irreversibility at each stage of the operation. In case of SAH, $vartriangle$h is computed based on specific heat capacity and temperature of air at inlet and outlet and $vartriangle$S is computed based on the temperature and pressure…

through this technology can save a municipality millions each year. Deep water cooling is a sustainable resource due to water's unique properties. Water, which does not freeze in large bodies of water below the surface, and has a relatively high specific heat capacity creates permanent reservoirs of dense, cold water which is replenished each winter. "Because the water is from the depths of the lake (83 meters deep), it is free of odors and impurities, reducing the need to chemically treat the…

concrete during cold weather. #1 Never Lay Concrete On Frozen Ground The key to laying concrete during the winter time is to never lay it when the ground is frozen or on top of snow or ice. When you lay concrete on frozen ground, the coldness will transfer to the concrete and will slow down the drying process. Additionally, when the ground thaws, it will settle and expand, which will cause the concrete to crack. #2 Warm Up The Ground Before Laying Concrete If you want to lay concrete…

Where M.R is the moisture loss ratio, M_0 is the initial moisture content, M_t is the moisture content at time t, M_e is the equilibrium moisture content, t is time (minutes), and a, b, c, and k are constants. For the effectiveness of diffusivity, Fick’s equation was used (5) to estimate the dehydration kinetic of different osmotic conditions. M.R=((M_t-M_e)/(M_0-M_e ))=〖8/π^2 e〗^((-(π^2 Dt)/(4L^2 )) ) …(5) Where D is the effective diffusivity, and L is the length of the (cubical) sample.…