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FAQ

what is the final temperature of 250g of water whose initial Temperature is 25 C if 80-g of aluminum initially at 70 C is dropped into the water? The specific heat of aluminum is 0.215 cal/C g how do you do it? our teacher did not show us how and it is not in the book

Given Data :-- Mass : Aluminium m(a) = 80 g, Water m(w) = 250 g Initial Temperature : Aluminium t? = 70 C and Water t?' = 25 C Final Temperature of both ( aluminium and water ) = T C (assume) Since Aluminium is initially at a temperature higher than that of water, it (aluminium) will lose heat to water . Heat lost by Al = Q = mass of Aluminium x sp.heat capacity of Aluminium x Temp. change = Q = 80 x 0.215 x ( 70 - T ) cal Heat gained by water = Q' = mass of water x sp.heat capacity of water x Temp. change = Q' = 250 x 1 x ( T - 25 ) According to principle of calorimetery . = Heat lost by aluminium = heat gained by water. = 250 x 1 x ( T - 25 ) = 80 x 0.215 x ( 70 - T ) = T = 27.9 C .... ( Rounded to one decimal place )...... Answer Answer .

The heat of fusion of aluminum is 3.95kj/g. What is the molar heat of fusion of aluminum? What quantity of energy is needed to melt 10.0g of aluminum? What quantity of energy is required to melt 10.0 mol of aluminum? Three questions i need help with can someone show me step by step please so i can get it thank you a bunch

Heat Of Fusion Of Aluminum

Aluminum coils are manufactured to specific dimensions through a series of processes that involve precision engineering and cutting-edge technology. The process starts with the selection of high-quality aluminum ingots, which are then melted and cast into long, flat strips. Once the aluminum is in the form of flat strips, it undergoes a series of rolling operations. The strips are passed through a rolling mill, where they are progressively reduced in thickness and elongated in length. This rolling process helps in achieving the desired dimensions and thickness for the coils. After the initial rolling, the strips are subjected to a process called annealing. Annealing involves heating the aluminum to a specific temperature and then cooling it slowly. This process helps in improving the ductility and reducing the internal stresses in the metal, making it easier to work with in subsequent manufacturing steps. The next step is slitting, where the wide strip is cut into narrower strips of the desired width. This is done using high-precision slitting machines that ensure accurate and consistent dimensions for each coil. The slitting process also involves edge trimming to remove any irregularities and ensure straight edges. Once the narrower strips are obtained, they are coiled using specialized machines. These machines carefully wind the strips into coils of the desired size and shape. The coiling process ensures that the aluminum is tightly wound and securely held in place. To further enhance the dimensional accuracy, the coils may undergo a final leveling process. This involves passing the coils through a leveling machine that applies pressure to flatten any irregularities or distortions in the metal, ensuring a uniform and consistent thickness. Overall, the manufacturing of aluminum coils to specific dimensions requires a combination of precision rolling, slitting, coiling, and leveling processes. These processes, along with advanced machinery and quality control measures, ensure that the final product meets the exact specifications required by the customer.

Aluminum roll width 750mm, single layer thickness 6.5mm, diameter 400mm., how to calculate the weight of the aluminum roll?

You can use the outside diameter, the inner diameter and the width to get the volume. You know the density and volume, and then you can find the weight naturally

I was told today that taking aluminium inside your body greatly increases the chance of getting alzheimers as they destroy cells. What foods contain aluminium?

challenging task. do a search over bing and yahoo. that will might help!

In my line of work I see aluminum ground lugs, bonding nuts and straps and also neutral bars eat copper up, especially when exposed to the elements. I know how galvanic reaction works between elements under current load, but my question is why do aluminum and copper seem to hate each other more than any other? And, why would they still be required in usage together per NEC code?

This problem arises between various metals such as iron aluminium where some form of plastic barrier is needed to stop electrochemical reaction taking place where these metals are in long term contact with each other especially in a wet environment. As far as aluminium copper are concerned, the difference in their chemical reactivity is particularly large; aluminium is a highly reactive metal that quickly becomes dull by coating itself with a very thin layer of aluminium oxide whilst copper is one of the least reactive of all metals. However, once covered with a fine layer of aluminium oxide, aluminium will tend not to corrode further. The effect of this is that any copper that does go into solution as a result of contact with weak atmospheric acids will very readily precipitate again as metallic copper onto the aluminium. Reactions similar to those below will readily take place: H2O (rain) + CO2 --- H2CO3 (carbonic acid - carbon dioxide dissolved in rain water) Cu + H2CO3 --- CuCO3 + H2 In an aqueous environment, 3 CuCO3 + 2 Al --- Al2(CO3)3 + 3 Cu Copper aluminium are regularly used because they are relatively low cost when compared with potential alternatives, even with recent commodity price increases. Toughened plastic has replaced copper in certain plumbing applications which have obviously eliminated this galvanic reaction problem.

To clean and maintain aluminum coils, you can follow a few simple steps. First, gather the necessary materials, including a soft brush or vacuum cleaner, a mild detergent or coil cleaner, a water hose, and a spray bottle. Start by turning off the power supply to the unit and ensuring that it is safe to proceed. Next, remove any debris or loose dirt from the coils using a soft brush or a vacuum cleaner with a brush attachment. Be gentle to avoid damaging the fragile fins of the coils. Once the loose dirt is removed, mix a solution of mild detergent or coil cleaner with water in a spray bottle. Spray the solution onto the coils, ensuring that it covers the entire surface. Let it sit for a few minutes to allow the solution to penetrate the dirt and grime. After the solution has had time to work, use a soft brush or a soft cloth to gently scrub the coils. Be careful not to apply excessive pressure or use abrasive materials, as this could cause damage. Pay extra attention to any areas with stubborn dirt or buildup. Once you have thoroughly cleaned the coils, rinse them off with a water hose. Ensure that all the detergent or coil cleaner is completely washed away. Make sure to direct the water flow in the opposite direction of the air flow to avoid pushing debris further into the coils. After rinsing, allow the coils to dry completely before turning the power supply back on. This will prevent any potential electrical hazards. You can use a fan or leave the coils to air dry naturally. To maintain the cleanliness of the coils, it is recommended to clean them at least once a year or more frequently if the unit is exposed to heavy dirt or debris. Regularly inspecting the coils for dirt buildup and promptly cleaning them will help maintain the efficiency and extend the lifespan of the aluminum coils.

Yes, aluminum coils can be used for roofing applications. Aluminum is a popular choice for roofing due to its lightweight nature, durability, and resistance to corrosion. It is commonly used for both residential and commercial roofing projects.