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%%EOF Add the 5.0 g of NH4NO3 to the water in the coffee cup and place the lid on top. If you do not allow these cookies, some or all of the site features and services may not function properly. Pour the ammonium nitrate crystals into … First of all you are going to decide which chemical should be in the pack by trying some different chemicals. They learn about exothermic and endothermic reactions and use this knowledge to design a hot/cold pack that is small enough for children to use. Page 1 Design a Hot Pack or a Cold Pack 1 Objectives • Explain how calorimetry is used to measure heat transfer from a chemical process. Click Agree and Proceed to accept cookies and enter the site. endstream endobj 228 0 obj <>/Metadata 22 0 R/PageLayout/OneColumn/Pages 225 0 R/StructTreeRoot 42 0 R/Type/Catalog>> endobj 229 0 obj <>/ExtGState<>/Font<>/XObject<>>>/Rotate 0/StructParents 0/Type/Page>> endobj 230 0 obj <>stream They are constructed of a large pouch containing a dry chemical plus an inner pouch of water. These cookies, including cookies from Google Analytics, allow us to recognize and count the number of visitors on TI sites and see how visitors navigate our sites. Ice Pack Substitute Graph 2. Small zip-lock baggies of Ammonium Nitrate can be kept handy as cold packs. Measure out 5.0 g of NH4NO3. THE ANSWERS WILL DIFFER FROM THE RESULTS IN THE LAB. 260 0 obj <>/Filter/FlateDecode/ID[<6FFD01D1B723AC4B86F245F0D7661B9E><5DA6A7C0C58C4C4C970AE93908C56032>]/Index[227 62]/Info 226 0 R/Length 140/Prev 274295/Root 228 0 R/Size 289/Type/XRef/W[1 3 1]>>stream Interest-based ads are displayed to you based on cookies linked to your online activities, such as viewing products on our sites. Place 1 polystyrene cup inside another and then place both cups inside a 400-mL beaker. A chemistry report about how to make a cold pack using endothermic and exothermic reactions. Part 2- You and your partner will design and conduct an experiment to determine if the amount of the chemical from Part 1 affects its use in the cold pack. You can control your preferences for how we use cookies to collect and use information while you're on TI websites by adjusting the status of these categories. Setup temperature probe and graphing calculator with EasyData. All rights reserved. Set up equipment- cup, and three ionic salts. Pre-Lab Safety You need to be aware and use appropriately each of the above chemicals. Students profit greatly when they view their knowledge and exploration of knowledge in the context of practical applications to daily life. Hot/cold packs are used by athletes to minimize swelling of injuries such as muscle and joint sprains. The company is planning on using 60 ml of water in this cold pack. Your team manager has decided that there are three different chemicals that would be A cold pack is typically made of a thin plastic inner bag containing water. © Copyright 1995-2021 Texas Instruments Incorporated. Use a Sponge with Water. Record the highest temperature reached,Tf. We are here to help with distance learning resources for schools and districts. Part 1- You and your partner will design and conduct an experiment to determine which of the three chemicals is best for use in a cold pack. Water (distilled is preferred by not absolutely necessary). Thermochemistry Experiment: Virtual Lab Part 2: Design a Hot/Cold Pack _____ You can now print this page to turn in with your prelab. To determine which ionic compound will work more efficiently in the cold or hot packs as well as decide whether the company testing them will turn a profit from the packs. Set up 2 thermometers and stands and fill two beakers with 50 mL of water. You can see which substance cools off water the most by trying out this experiment. The design and improvement of the cold pack is an excellent example of the practical application of scientific knowledge. Record the temperature for 5 seconds. 0 Based on your calculations in your experiment chose one of the salts and design a cold pack. The experiment involves opening the cold pack and pouring the materials in test tubes to demonstrate the chemical reaction. First, they will use the engineering design process to define the criteria and constraints for a "good" cold pack. To find out more or to change your preferences, see our cookie policy page. These cookies enable interest-based advertising on TI sites and third-party websites using information you make available to us when you interact with our sites. Purpose: To calculate the molar enthalpy of dissolving for three ionic solids, and to use this information to design a cold pack. This is true because the difference was 4.36 degrees, but the baking soda (sodium bicarbonate) was 4.46 degrees. Problem: Based on your calculations in your experiment chose one of the salts and design a cold pack. 288 0 obj <>stream The bag of water will be placed inside the bag that contains the salt so when the bag of water is ruptured, the salt and water can mix. In this experiment you will measure the heat changes which occur from various salts dissolving in water, and then you will use this information to design a hot pack and a cold pack to generate a certain temperature change. Do no add it to the cup. h��Yko۸�+�آ�囒�E'i��ucߦ[��XI��%������w���+���hQ�!9����pˆ0��n��n�p�� � Q�����"h�L� ��Q@� ��8T �����&��&�I�����d[#� ��i8�BF�*�(J��L�"IT��E��$j�v���J@��c. Place the lid on the calorimeter, pu… Assume that the specific heat of the pack (salt and water) is 4.18 J/g?C and that the cold pack is initially at 23 ?C. Now repeat steps #1- #10 using 5 grams CaCl2. Cold packs actually use a scientific process called ‘endothermic reaction’. For these new products, we at DJ Sporting Goods tested five different compounds dissolved in water for the amount of energy they either absorbed or released. Must work instantly : The faster cold is applied to the injury, the more quickly swelling will be reduced. All 2021 T³IC sessions are now available on demand through May 31. h�b```������@(������a�Q��8�)/&0 �FE��i�.7�X��9�uL�3� Measure out 100 ml of distilled water in a graduated cylinder. The hot/cold pack is activated by breaking the seal on the pouch of water and shaking the pack … This helps us improve the way TI sites work (for example, by making it easier for you to find information on the site). Lower the temperature probe into the water in the Styrofoam cup. Through our experiment, we found that Ammonium Chloride was the best chemical to use for our cold pack, and Calcium Chloride was the best to use for a hot pack. Bring a new dimension of learning to your classroom with activities that put math in motion. 3. �v�G�H���:00�v� P����� ��a1ut���@Z���"!�QY�Ռ�o��1z0�`Qb��R��"ø�%�i �,����;�Vro��b�4��b�c�S_��z� �\�)7���-��"���s�>�W$Xt��4#� ��7� Then they will explore different chemical reactions and determine … The total mass of the pack (salt and water ) is 400 g. The temperature change desired is 10 ºC. That bag, in turn, is surrounded by a heavier plastic bag containing a solid substance. Download free 90-day trial versions of the most popular TI software and handheld emulators. Record the exact mass of the salt used. The temperature reading, in C, is displayed on the upper-right corner of the graph. Demonstrate a commercial hot pack/cold pack. (If you don't use a bag, your sponge will likely stick to … This is your calorimeter for measuring changes in temperature. Kitchen sponges are soft, squishy, and flexible in nature, which makes them perfect for DIY ice packs! Measure 100 mL of water with a graduated cylinder and pour it into the top polystyrene cup of the created calorimeter. We are performing the experiment to assist the Dystan Medical Supply Company with determining the enthalpies of change for the ionic compounds that they have provided. Explain that in this lesson, students' goal is to design their own instant cold pack. If you do not allow these cookies, some or all site features and services may not function properly. Stir the solid until it dissolves. If you are doing a demonstration, making a cold pack, or just seeking examples of endothermic reactions and processes, there are other chemicals you can react to get a lowered temperature: Barium hydroxide octahydrate with ammonium chloride. Empty out the coffee cup, rinse. The invention of the ‘cold pack’ is a little piece of science wrapped up in a package with a bit of water added. Many people know that cold packs feel cold when activated, but they may not know the science behind it. 3. Demo #3: (Reading a thermometer properly) 1. We may also share this information with third parties for these purposes. Just run one under water until it's fully soaked, then add it to a ziplock bag and toss it in the freezer. Shake the instant cold pack gently to move the water bag and crystals to the bottom. Chemistry Concept: The purpose of this experiment is to demonstrate an endothermic reaction. Cut the top of the bag off. endstream endobj startxref Mixing the two creates a chemical reaction that uses up energy, which makes the mixture colder. Ammonium nitrate and water. Learn on your own schedule! When needed, simply add water in any form and seal the bag for an instant cold pack. 1. %PDF-1.5 %���� Potassium chloride and water. Immerse the thermometers in the beaker and record the initial temperature of the water. 2. Select to begin to monitor temperature. Begin recording the temperature of the water in the cup, Ti. • Measure the heat absorbed or released when salts are dissolved in water. Collect the ammonium nitrate from the instant cold pack, as follows: Put on your safety goggles and latex gloves. Find where to buy the TI-84 Plus CE graphing calculator in a variety of bold, fun colors. Cold packs can be used to reduce swelling from a bruise or injury. There are chemicals in one area and when they are added (or shaken) into the water it causes a reaction that makes the water icy cold. These cookies are necessary for the operation of TI sites or to fulfill your requests (for example, to track what items you have placed into your cart on the TI.com, to access secure areas of the TI site, or to manage your configured cookie preferences). Groups conduct an experiment to determine which of four chemicals are in hot/cold packs. Cold packs are used to treat sprained ankles and similar injuries. Frequently the solution gets so cold that water vapor from the air begins to condense on the outside of the beaker. These cookies help us tailor advertisements to better match your interests, manage the frequency with which you see an advertisement, and understand the effectiveness of our advertising. These cookies help identify who you are and store your activity and account information in order to deliver enhanced functionality, including a more personalized and relevant experience on our sites. The instant cold pack they are planning to make will consist of two bags: one containing water and the other containing one of the salts. Repeat the same procedure to design a hot pack. I think that the results went moderately well with the hypothesis in the fact that the salt was the second coldest. Purpose: To calculate the molar enthalpy of dissolving for three ionic solids, and to use this information to design a cold pack. Add the water to the coffee cup. Designing a Cold Pack Chemistry Report | Chemistry - Year 11 WACE | Thinkswap thinkswap 1. When the pack is twisted, the inner bag breaks and releases the water. Task 1 – which chemical should you use? You can make a basic cold pack by mixing a salt (such as potassium chloride) or soda (such as baking soda) with water. 2. Assume that the specific heat of the pack (salt and water) is 4.18 J/gºC and that the cold pack is initially at 23 ºC. These cookies allow identification of users and content connected to online social media, such as Facebook, Twitter and other social media platforms, and help TI improve its social media outreach. • Determine the enthalpy of solution for MgSO 4 , K 2 SO 4 , KNO 3 and NH 4 NO 3 . The total mass of the pack (salt and water ) is 400 g. The temperature change desired is 10 ?C. • Design and test a hot pack or a cold pack. Virtual Lab Part 2: Design a Hot/Cold Pack NOTE: THE AUTOGRADING FEATURES FOR THIS ASSIGNMENT ARE NOT CURRENTLY WORKING WITH THE HTML5 VERSION VIRTUAL LAB. The cold pack has to be easy to carry around in a first aid kit, safe to use and only get cold when it is needed. The change between H2O#3-CA was a decrease, 0.84. You're getting warmer. Cold pack design criteria: Must involve a chemical reaction that produces a decrease in temperature : The damage from sprains, pulls and tears is reduced if cold is applied immediately. Chemistry 106: General Chemistry II Experiment 1- Hot and Cold Section 2 – Group 3 October 1, 2007 (names omitted) time that the likely cause for this result was that somehow there was a leak of heat from the calorimeter, most likely because of the high initial hot water temperature. h�bbd```b``��� �i���f������d���I�H�d5�O#L`- �����"�`��dT�|�@䂩@�1�,����}2����`��a(�M��`�#��;o���@�AJ�g`�x` B�� 4.place the beaker on your back­hand to feel whether it’s hot or cold 5.Record the result 6.Repeat these steps with another substance in the list TI websites use cookies to optimize site functionality and improve your experience. In this experiment you will measure the heat changes which occur from various salts dissolving in water, and then you will use this information to design a hot pack and a cold pack to generate a certain temperature change. 227 0 obj <> endobj

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