INVESTIGATING THE BEST SALT COMPOUND TO USE FOR A COLD PACK An endothermic reaction is a chemical reaction that absorbs heat into its environment. The energy is usually transferred as heat energy, causing its surroundings to get colder. The opposite to an endothermic reaction is an exothermic reaction. An exothermic reaction releases cold energy which absorbs heat energy. As a result of this, the surroundings distinctively become hotter. In this experiment an exothermic reaction takes place. The cold packs that are available for purchase in shopping centers use ammonium nitrate (N₂H₄O₃), calcium ammonium nitrate and urea. These chemicals together, help to form the endothermic reaction after the inner bag of water is broken inside. These …show more content…
Sparkvue: Sparkvue is a program that records the temperature of the water as you mix it inside of the test tube. Cold Pack: A cold pack is an ice pack that you apply to your skin that relieves swelling and pain. ---------------------------------------------------------------------------------------------------------------------------------------------- Aim To investigate the best salt compound to use for a cold pack. Hypothesis: If the sodium thiosulfate is endothermic and stays the same way, then that compound would be the best to use for a cold pack because it stays cooler for longer. Independent Variable: The independent variable is the salts that was used in the experiment, sodium thiosulfate and citric acid. This is because the scientist is changing the the different salts every trial. Controlled Variable: The controlled variable that always stayed the same throughout the experiment was the amount of time the salts were being mixed for. Another controlled variable was the weight of the salt being added to the water, and the quantity of water the salt was being added into. Dependent …show more content…
It is evident in this diagram that in the first minute the sodium thiosulfate drops in temperature dramatically. The citric acid doesn’t show as dramatic results as the sodium thiosulfate does. In all 3 graphs the results are consistent and remains the same for all, which shows that sodium thiosulfate is the best salt compound to use for a cold pack. These results will help scientists in the future to create cold packs that will stay colder for longer. It will educate people all over the world in letting them know what the most effective cold pack is and will also help people treat their injuries if need be. Conclusion: Based on the results acquired in the experiments, it would be best to use sodium thiosulfate for a cold pack. The best type of cold pack to use would be an instant pack. These cold packs allow the user to squeeze it and immediately, as a result of this the cold pack will get
Situation and SWOT Analysis YETI coolers are built with purpose and are designed to withstand abuse from the outdoor elements. The entire reason the founders designed YETI coolers was to aid outdoorsman in their everyday lives. From fly fishing in Belize to elk hunting in Colorado, the YETI was made to store perishables for an extended amount of time and endure the abuse of the miles traveled. YETI’s mission statement is interrelated with their founder’s needs’, “Build the cooler we’d use everyday.” The cooler is made for outdoorsmen/women, commercial fishing, hunting, and outdoor activities that can keep game, food, drinks, beer, wildly longer and colder.
Scientist think the antifreeze gene evolved after there was a mutation occurred during the duplication of the original gene.
Vannie, S. M. D., Braz, J. R. C., Modolo, N. S. P., Amorium, R. B., & Rodrigues, G. R. (2003, March). Preoperative combined with intraoperative skin-surface warming avoids hypothermia caused by general anesthesia and surgery. Journal of Clinical Anesthesia, 15, 119-125.
The crystal structure (II) is found to be disordered tetragonal, space group P4͞ 21m, a = 5.7193 , c = 4.9326 A0,,Z=2 . The phase (IV) of AN is stable between the temperature -18 and 32.30C. It belongs to the orthorhombic structure with space group Pmmn. It has a coordination number of two. The IV-III transition take place at near temperature about 32 0C. it causes swelling, caking and particle deterioration of stored ammonium nitrate. The IV-III transition only occurs when moisture is present and this transition takes place by the dissolution and recrystallization of the solid . During recystallization process salt bridges are formed between the crystallites. This phase transition is followed by a volume change. It also leads to the ...
The dependent variable that will be measured is the height at which the ball bounces back. The control variables that will need to be kept constant if the results are to be as accurate as possible are. 1. What is the difference between a. and a. The weight of the ball; we will use the same ball throughout the experiment to ensure that the results are as accurate as possible.
The company provides innovative solutions to combat postoperative conditions such as hypothermia. Medical research indicates that 60 to 80 percent of all postoperative recovery room patients are clinically hypothermic. Hypothermia is caused by a patient’s exposure to cold operating room temperatures that are required by surgeons to control infection, and for the personal comfort of the surgeon. Hypothermia can also be a result of heat loss due to evaporation of the fluids used to scrub patients, evaporation from exposed bowel, and breathing of dry anesthetic gases. Dr. Augustine’s personal experience in the operating room convinced him that there was a need for a new system to warm patients after surgery.
Have you ever had bruising, inflammation or swelling that you needed to tend to? Or maybe you had a sports injury at one time. If you have, then you may have used an instant cold pack, which is a device that you may have lying around at home and is a convenient replacement for an ice
Our task was to investigate what the optimum ratio of solute to solvent that will produce the maximum cooling/heating effect?
Independent variables: The temperature of hcl gas will be decreased and increased throughout the experiment.
According to Table 1, formulation C has the highest moisture content (34.15 ± 2.67) and formulation B has the lowest moisture content (28.30 ± 2.91). Potassium carbonate is a drying agent, known to be very soluble in water and also absorbs water from the air. That is why formulation C has the highest moisture content. According to “Soda Ash: Technical and handling Guide”, soda ash loses water when heated and its solubility
Methodology: A plastic cup was filled half way with crushed ice and mixed with four spoonfuls of 5 mL of sodium chloride. A thermometer was quickly placed inside the cup to take the temperature and the
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...antifreeze, the same liquid used in cars so that it doesn’t overheat in the summer or freeze in the winter. This technology helped to remove forty to sixty percent of Stevie’s body heat and changed his life forever (Woodfill).
Constants: The constants in this experiment will consist of the same yeast added in each flask, the same brand will be used for each to prevent any interference with accuracy of the results. The source of water (tap water) will be the same for all levels of the independent variable. and control while the beakers filled with solutions and control will all be the same size for each trial.digital
Firstly, we need to keep the chemical at a constant concentration. So, in this experiment we have chosen to keep hydrochloric acid at a constant concentration (5cm3). We could have, however, used Sodium Thiosulphate as a constant, but we had chosen to use Hydrochloric acid. Next, we must make sure that the solution is kept at a constant volume throughout the experiment. If the volume is different, then it could give different results if it was at a constant volume.