Note: I couldn’t paste in pictures and diagrams so please excuse any large spaces. Planing my investigation Method 1.Firstly I will measure 20ml of Copper Sulphate solution (CuSO4) in a measuring cylinder‚ for precise accuracy‚ and then pour the solution into test tube. I will place the test tube into a beaker and insulate the test tube‚ for minimum heat loss. (As shown in the diagram above.) 2.Secondly I will measure the required amount of Zinc (Zn) on a weighing scale‚ again for precise accuracy
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OBSIDIAN HYDRATION There are two ways of Obsidian Hydration. One is to determine if the artifact is older or younger as the other is a calendar date of AD/BC being used. The decision of which one to use is relative or absolute dating depends on the environment’s condition. The dating of Obsidian Hydration artifacts‚ which is based on the fact that a freshly made surface of obsidian will absorb water from it’s surroundings to form a measurable hydration layer. For example‚ cracking of the lava
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researchers published an empirical article called the “Comparison of the Effects of Hydration with Water or Isotonic Solution on the Recovery of Cardiac Autonomic Modulation”. The purpose of this study was to determine the importance of hydrating after strenuous activity. The ideal time that someone hydrates by drinking water‚ Gatorade‚ or any other sport drink is unclear. The researchers do know‚ however‚ that hydration helps with tolerance to strenuous activity because it helps regulate the body’s
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Introduction Enthalpy change‚ ΔH‚ is defined as the heat output of a system as it goes through a reaction under constant pressure. It is an important aspect of thermochemistry‚ which is the study of energy changes during a chemical or physical reaction . When we calculate enthalpy change‚ we always assume that the pressure is constant. We are able to calculate enthalpy change numerous ways‚ notably by the increase in heat‚ Q‚ given by an exothermic reaction or the heat absorbed by an endothermic
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Benefits of Hydration The body is made up of around 75% water. Keeping the body adequately hydrated is a must to ensure good health especially in athletes. Sometimes proper hydration is difficult for people if they do not prefer the taste of water. This can lead to serious problems with their health. Determining your hydration can be simply done in two ways. One way to determine your hydration is to examine your urine. If you are properly hydrated it will appear pale yellow or sometimes clear
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Change in Potential Energy Worksheet 1. A 7.3 kg gallon paint can is lifted 1.78 meters vertically to a shelf. What is the change in potential energy of the paint can? 2. A roller coaster car of mass 465 kg rolls up a hill with a vertical height of 75 m from the ground. What is the change in potential energy relative to the ground? 3. If the car in problem #2 starts at rest from the height of 75 m‚ what will its speed be when it is 5 meters from the ground? What is the change in potential
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Thermochemistry: An Ice Calorimeter Determination of Reaction Enthalpy Heidi Moen Chemistry 151 Lab Section No. 47905 09/02/2010 Instructor: John Weide Abstract: In this experiment‚ an ice calorimeter was used to measure the energy transferred from a system to the surroundings in an isothermal heat transfer. By measuring the change
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Enthalpy of Neutralization Introduction Energy changes always accompany chemical reactions. If energy‚ in the form of heat‚ is liberated the reaction is exothermic and if energy is absorbed the reaction is endothermic. Thermochemistry is concerned with the measurement of the amount of heat evolved or absorbed. The heat (or enthalpy) of neutralization (∆H) is the heat evolved when an acid and a base react to form a salt plus water. Eq. 1 HNO2(aq) + NAOH(aq) → NaNO2(aq) + H2O(l) + Q Q in the
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hospitals and health-care facilities around the world are unable to use safe‚ clean water; and the Royal College of Nursing recognized this that they ensure patients in acute care receive clean‚ fresh water to encourage hydration.
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LAB OF ENTHALPY CHANGE IN COMBUSTION Objective: Determine the Enthalpy change of combustion ΔHc of three different alcohols. Methanol‚ Ethanol and Isopropilic acid. Procedure: 1. Fill the spirit micro burner with Ethanol and weight it 2. Pour 100 cm3 of water into the aluminum cup 3. Arrange the cup a short distance over the micro burner 4. Measure the temperature of water 5. When the temperature of the water has risen by 10°C‚ record the temperature. 6. Reweight
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