How will the temperature of the water change in reaction to the addition of the ammonium nitrate and the calcium chloride?
Background Information: The experiment deals with cold packs and hot packs and it demonstrates how they work. Cold packs and hot packs are used to help heal injuries mainly. Cold packs help heal sprained ankles, since they remove heat from the inflicted area and make the blood vessels tighten, which lowers the inflammation and pain. Cold packs usually include water, ammonium nitrate or some other salt and fertilizer. The water is kept separate in an inner container separate from the ammonium nitrate until the cold pack is needed. When the cold pack is needed, the cold pack is squeezed, which makes the inner container of water open and the ammonium nitrate to mix. The ammonium nitrate dissolves in the water and creates the cold pack. The cold pack is used to decrease the effect of increased blood flow to an area, while a hot pack is used to increase blood flow to an area, such as an area with deep muscle pain. The hot pack adds heat the affected area and makes the blood vessels dilate. Hot packs usually contain the same stuff as the cold pack does, but instead of ammonium nitrate, they contain calcium chloride. Therefore, when a hot pack is needed the pad is squeezed and the water and the calcium chloride mix, which creates the hot pack.
There are new concepts that relate to this lab, such as exothermic and endothermic reactions.
Endothermic reactions
However, other resources, such as mobile doctors may be available to prevent the patient from requiring hospital admission (17). Furthermore, certain approaches to pain relief, such as warm running water and cold packs, are not always readily available to paramedics. Thus implementing these procedures as a necessary part of paramedic practice would not prove practical. However, paramedics should be aware of the different approaches to relieving pain for these patients and be further aware that if the resources are available, they should be utilised in order to provide as much relief as possible to the suffering
The experiment is to observe a variety of chemical reactions and to identify patterns in
In this experiment, we learned about stoichiometry, empirical formula, molecular formula, polyprotic acids and bases, metathesis reactions, and moles.
The quantitative observation made from the temperature of the CuCl2 water using a thermometer is that the Copper Chloride Water had remained the initial temperature of 20⁰c, hence adding the Copper Chloride to the water would not make a difference in temperature as the mixture is a physical change.
A chemical reaction is when substances (reactants) change into other substances (products). The five general types of chemical reactions are synthesis (also known as direct combination), decomposition, single replacement (also known as single displacement), double replacement (also known as double displacement), and combustion. In this lab, the five general types of chemical reactions were conducted and observations were taken before, during, and after the reaction. Then the reactants and observations were used to determine the products to form a balanced chemical equation. The purpose of this lab was to learn and answer the question: How can observations be used to determine the identity of substances produced in a chemical reaction?
Most cold packs come with a fabric cover made to absorb condensation and to protect the skin from contacting the surface of the cold pack. Cold packs are used for injury or muscle relief. The cold pack contains two bags one containing water and the other containing ammonium chloride. Once the ammonium chloride is
In this experiment you will observe some physical and some chemical changes. You will observe that energy must be used to start some chemical reactions, and that it is produced in others.
Purpose: The purpose of this lab activity is to help understand observation and interpretation and to distinguish one from another all while analyzing the chemical reaction. You will see what happens when you put a beaker with water in it and then put dry copper and after that put aluminum foil in and see the observations and interpretation in the chemical reaction.
During this lab I learned how to convert the mass of a compound to the number of moles and then to the number of molecules, I also learned how to determine the concentration of a
A few more important terms to keep in mind when doing a lab with chemical and physical changes are
many of the techniques we employ in this lab, a company can synthesize new types
Abstract: Cold packs are based on the principle of endothermic reactions, which means a reaction that absorbs heat from the surrounding resulting in a temperature drop. Due to this temperature drop, cold packs have many benefits when it comes to injuries such as sprains and strains. It cools the local tissue and reduces bleeding, swelling and pain. It also aids in a speedy recovery. The most commonly used chemical in instant cold packs is ammonium nitrate which will be tested in the investigation along with four other chemicals in water. These other chemicals include potassium nitrate, potassium chloride, sodium acetate and sodium chloride. The
In this experiment, a saturated calcium sulfate was already made and ready to use. 25.00 mL of this solution was then mixed with 10 mL of an ammonia buffer and 1 drop of
The purpose of this lab was to test the law of conservation of mass by comparing the total mass of the reactants in a chemical reaction with the total mass of the product.
Purpose: This lab taught procedures for determining heat of capacity of a calorimeter and measuring enthalpy of change for three reactions. It also enforced methods of analyzing data obtained through experimentation and calculating enthalpy. These procedures are used in the branch of thermodynamics known as thermochemistry which is the study of energy changes that accompany chemical reactions. Concepts from this lab can be used to determine the potential energy of a chemical reaction. Much of the energy people depend on comes from chemical reactions. For example, energy can be obtained by burning fuel, metabolizing of food or discharging a batter.