The term Cp is the specific heat of the material (at constant atmospheric pressure). Different materials have different specific heat values. The units of specific heat are : Joules/gram deg – C. In this lab we will find the specific heat value of Zinc and compare it to accepted values.This will do by heating a mass of Zinc up to the temperature of boiling water and placing the hot metal into a cup of cold water. The thermal energy that the zinc loses goes into heating up the water in the cup. By knowing the starting temperatures and the final temperature of the water and the zinc, the specific heat of Zinc may be easily obtained.
This forms insoluble calcium carbonate. Beacause this insoluble calcium carbonate is formed. Calcium Carbonate covers the heating component meaning that more energy has to be used in order to heat the water to the same temperature. More noise is also made as the machine needs to work harder and sometimes waiting times increased due to the amount of time it takes to boil the water, the overall equations being: Ca(HCO3)2 (aq) → Ca2+ + 2HCO3 (aq) Ca2+ + 2HCO3 (aq → CO2 (g) + H2O (l) + CaCO3 (s). These factors prove that the efficiency of the product deacreases.
Also, both mechanical and chemical weathering aid in the development of spheroidal weathering. The first factor that influences the rate at which a rock is able to break down is the rocks characteristics. Rocks consist of minerals, which are solid substances that have their own unique chemical composition. The more reactive a mineral is to elements such as water and oxygen, the quicker it will weather. For example iron reacts to oxygen causing iron oxide to occur.
The effectiveness of lipase on temperature Abstract Enzymes are biological catalyst that speeds up the rate of reaction. Different enzymes work best at different temperatures, which is also called an optimum temperature. Different enzymes also have different functions. Lipases are enzymes, needed to break down lipids (fats and oils) into the products - glycerol and fatty acids. They work best at room temperature around 36-40 C. Introduction For this experiment, I will be looking at how the change in temperature affects the rate of reaction.
Hydrogen Peroxide at high concentrations can be lethal. Catalase is there to help with the processes of breaking it down to assure that this doesn’t happen. The purpose of this lab was to help us understand what happens when an enzyme works with a substrate to make the reaction faster. It was to help show us what the effects of pH and temperature on the enzyme’s reaction. My hypothesis for the experiment was that the optimum temperature for catalase to function is 98.6o F because this is the optimum temperature for the human body.
By standing too close to the sink it may spread any contamination to your cloths. Then, turn on the faucet and adjust the temperature so that the water is warm. If the water temperature is too hot or too cold it can dry out and chap your skin causing your skin to crack and cracked skin can allow infections into your body. Then, wet your hands by placing them under the flow of water, apply liquid soap, and work soap into a lather by rubbing your palms together and rub the soap in between your fingers for at least thirty seconds. Rubbing your hands together helps in the removal of microorganisms and other germs from the surface of your skin.
At this point, the sponge contains residual magnesium and magnesium chloride. Thus, the sponge is crushed and treated with hydrochloric acid and water in order to eliminate excess magnesium and magnesium chloride. Another method for removing the residues is the high temperature vacuum distillation. Although the hunter process is similar to the Kroll process, the hunter process is more expensive and it is only used for the production of small amounts of high purity powder. The hunter process follows the same steps as the Kroll process except for the fact that sodium is added to the vessel and therefore, NaCl is the salt that is entrapped in the pores of the sponge formed.
Date : 18/02/2013 Micro-scale Determination of the Activation Energy of the Hydrogen Peroxide-Iodide Reaction Abstract: The purpose of this experiment was to determine the rate at which hydrogen peroxide decomposes to water and oxygen with the use of an iodide catalyst. Using the logarithmic form of the Arrhenius equation: ln k’ = -Ea/RT + ln A . the activation energy was determined to be 52.3 kJ/mol. It was also found that increasing the temperature also increased the rate, as there was more energy available to increase the speed of the reaction. Introduction: The purpose of this experiment was to determine the Activation Energy of the Hydrogen Peroxide-Iodide reaction.
Rates of Reaction - Marble Chips and HCl In this experiment, marble chips, or Calcium Carbonate (CaCO3), will be dropped into a flask containing Hydrochloric Acid (HCl). The reaction is: CaCO3(s) + 2HCl(l) --> CaCl2 + H2O(l) + CO2(g) The experiment will determine whether or not stirring quickens the reaction rate, which will be illustrated by the slope of the lines in the data graph. If heat and stirring is added to a reaction, then the gas will be released quicker. This is so because when two compounds interact, or collide, a reaction occurs. If the compounds are made to collide faster, by way of stirring, then theoretically the reaction as a whole will start faster and come to completion faster.
Similarly when the Calcium Carbonate (CaCO3) is broken down into powder the rate of reaction will increase. Because smaller pieces of the same mass of solid have a greater surface area compared to larger pieces of the solid. With this in mind when the Calcium Carbonate (CaCO3) is in solid form, the reaction rate will decrease. Procedure 1. Wear safety goggles 2.