Frequently the solution gets so cold that water vapor from the air begins to condense on the outside of the beaker. Add the water to the coffee cup. %%EOF 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. We are here to help with distance learning resources for schools and districts. To find out more or to change your preferences, see our cookie policy page. Place 1 polystyrene cup inside another and then place both cups inside a 400-mL beaker. Select to begin to monitor temperature. 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. Measure out 100 ml of distilled water in a graduated cylinder. 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. Then they will explore different chemical reactions and determine … The hot/cold pack is activated by breaking the seal on the pouch of water and shaking the pack … Measure 100 mL of water with a graduated cylinder and pour it into the top polystyrene cup of the created calorimeter. 288 0 obj <>stream First of all you are going to decide which chemical should be in the pack by trying some different chemicals. Problem: Based on your calculations in your experiment chose one of the salts and design a cold pack. Water (distilled is preferred by not absolutely necessary). Collect the ammonium nitrate from the instant cold pack, as follows: Put on your safety goggles and latex gloves. Click Agree and Proceed to accept cookies and enter the site. You can see which substance cools off water the most by trying out this experiment. 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. Designing a Cold Pack Chemistry Report | Chemistry - Year 11 WACE | Thinkswap thinkswap Now repeat steps #1- #10 using 5 grams CaCl2. Cut the top of the bag off. Set up equipment- cup, and three ionic salts. 1. Explain that in this lesson, students' goal is to design their own instant cold pack. Ice Pack Substitute Graph 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. 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. You can make a basic cold pack by mixing a salt (such as potassium chloride) or soda (such as baking soda) with water. Potassium chloride and water. If you do not allow these cookies, some or all of the site features and services may not function properly. Learn on your own schedule! Pre-Lab Safety You need to be aware and use appropriately each of the above chemicals. 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. Begin recording the temperature of the water in the cup, Ti. When the pack is twisted, the inner bag breaks and releases the water. Shake the instant cold pack gently to move the water bag and crystals to the bottom. Purpose: To calculate the molar enthalpy of dissolving for three ionic solids, and to use this information to design a cold pack. Use a Sponge with Water. 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. Cold packs actually use a scientific process called ‘endothermic reaction’. The change between H2O#3-CA was a decrease, 0.84. Thermochemistry Experiment: Virtual Lab Part 2: Design a Hot/Cold Pack _____ You can now print this page to turn in with your prelab. This is your calorimeter for measuring changes in temperature. Small zip-lock baggies of Ammonium Nitrate can be kept handy as cold packs. © Copyright 1995-2021 Texas Instruments Incorporated. Download free 90-day trial versions of the most popular TI software and handheld emulators. Repeat the same procedure to design a hot pack. 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. Immerse the thermometers in the beaker and record the initial temperature of the water. You're getting warmer. This is true because the difference was 4.36 degrees, but the baking soda (sodium bicarbonate) was 4.46 degrees. The experiment involves opening the cold pack and pouring the materials in test tubes to demonstrate the chemical reaction. Empty out the coffee cup, rinse. Chemistry Concept: The purpose of this experiment is to demonstrate an endothermic reaction. Ammonium nitrate and water. Must work instantly : The faster cold is applied to the injury, the more quickly swelling will be reduced. They are constructed of a large pouch containing a dry chemical plus an inner pouch of water. 1. All 2021 T³IC sessions are now available on demand through May 31. 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. 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. Record the temperature for 5 seconds. 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. TI websites use cookies to optimize site functionality and improve your experience. Lower the temperature probe into the water in the Styrofoam cup. Record the exact mass of the salt used. • Determine the enthalpy of solution for MgSO 4 , K 2 SO 4 , KNO 3 and NH 4 NO 3 . Demo #3: (Reading a thermometer properly) 1. 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. h�bbd```b``��� �i���f������d���I�H�d5�O#L`- �����"�`��dT�|�@䂩@�1�,����}2����`��a(�M��`�#��;o���@�AJ�g`�x` B�� Many people know that cold packs feel cold when activated, but they may not know the science behind it. %PDF-1.5 %���� 3. 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. �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� Stir the solid until it dissolves. Record the highest temperature reached,Tf. A chemistry report about how to make a cold pack using endothermic and exothermic reactions. Students profit greatly when they view their knowledge and exploration of knowledge in the context of practical applications to daily life. First, they will use the engineering design process to define the criteria and constraints for a "good" cold pack. Mixing the two creates a chemical reaction that uses up energy, which makes the mixture colder. Setup temperature probe and graphing calculator with EasyData. 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. That bag, in turn, is surrounded by a heavier plastic bag containing a solid substance. • Design and test a hot pack or a cold pack. Your team manager has decided that there are three different chemicals that would be This helps us improve the way TI sites work (for example, by making it easier for you to find information on the site). 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. The temperature reading, in C, is displayed on the upper-right corner of the graph. Demonstrate a commercial hot pack/cold pack. 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. Hot/cold packs are used by athletes to minimize swelling of injuries such as muscle and joint sprains. Interest-based ads are displayed to you based on cookies linked to your online activities, such as viewing products on our sites. If you do not allow these cookies, some or all site features and services may not function properly. When needed, simply add water in any form and seal the bag for an instant cold pack. A cold pack is typically made of a thin plastic inner bag containing water. 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. 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 Pour the ammonium nitrate crystals into … The total mass of the pack (salt and water ) is 400 g. The temperature change desired is 10 ?C. Cold packs are used to treat sprained ankles and similar injuries. 3. 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 The invention of the ‘cold pack’ is a little piece of science wrapped up in a package with a bit of water added. Task 1 – which chemical should you use? Bring a new dimension of learning to your classroom with activities that put math in motion. 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. 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. Just run one under water until it's fully soaked, then add it to a ziplock bag and toss it in the freezer. 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. 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. Cold packs can be used to reduce swelling from a bruise or injury. Set up 2 thermometers and stands and fill two beakers with 50 mL of water. 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. 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. (If you don't use a bag, your sponge will likely stick to … 2. Kitchen sponges are soft, squishy, and flexible in nature, which makes them perfect for DIY ice packs! Groups conduct an experiment to determine which of four chemicals are in hot/cold packs. I think that the results went moderately well with the hypothesis in the fact that the salt was the second coldest. 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 The design and improvement of the cold pack is an excellent example of the practical application of scientific knowledge. Place the lid on the calorimeter, pu… 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). We may also share this information with third parties for these purposes. Purpose: To calculate the molar enthalpy of dissolving for three ionic solids, and to use this information to design a cold pack. Add the 5.0 g of NH4NO3 to the water in the coffee cup and place the lid on top. All rights reserved. • Measure the heat absorbed or released when salts are dissolved in water. Do no add it to the cup. The company is planning on using 60 ml of water in this cold pack. endstream endobj startxref 227 0 obj <> endobj Measure out 5.0 g of NH4NO3. THE ANSWERS WILL DIFFER FROM THE RESULTS IN THE LAB. 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. The total mass of the pack (salt and water ) is 400 g. The temperature change desired is 10 ºC. h�b```������@(������a�Q��8�)/&0 �FE��i�.7�X��9�uL�3� Based on your calculations in your experiment chose one of the salts and design a cold pack. 2. Find where to buy the TI-84 Plus CE graphing calculator in a variety of bold, fun colors. 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. 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. 0
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