Cold Pack Hypothesis
Marco Grogan, Emily Hendrigan
Group 6, period 5
10-05-17
A cold pack is a device that creates an endothermic reaction by mixing water and one of many possible chemicals. In the scientists’ experiment they will find out which chemical will keep the water cold the longest. The independent variable for the experiment is the amount of chemicals (in teaspoons) added to each cup of water, while the dependent variable is the temperature of the water before and after the experiment, and the constant will be the cup of water that will have no chemicals added.
If one teaspoon of ammonium chloride, calcium chloride, and sodium chloride are added to separate glasses of water, then ammonium chloride will keep the water cold the longest because it is most commonly used in brand name cold packs. In order to test the hypothesis, the scientists will label four cups to keep track of what chemical will go in each cup. One will just be plain water, while the next will be labeled ammonium chloride, calcium chloride, etc. Then the scientists will pour fifty mL of water into each cup and measure the temperature of the water in each cup. The scientists will then add one teaspoon of each chemical into the corresponding cup. …show more content…
Robbins and it was originally made for food but now a similar design is used to treat bruises and other similar wounds. Robbins created the chemical freezing package when he accidentally mixed ammonium nitrate and water and witnessed and endothermic reaction. A modern instant cold pack is a device that consists of two bags; one containing water, inside a bag containing ammonium nitrate, calcium ammonium nitrate or urea. When the inner bag of water is broken by squeezing the package, it is allowed to dissolve the solid in an endothermic reaction. An endothermic reaction is a process where something absorbs energy that is usually in the form of
Group 6, period 5
10-05-17
A cold pack is a device that creates an endothermic reaction by mixing water and one of many possible chemicals. In the scientists’ experiment they will find out which chemical will keep the water cold the longest. The independent variable for the experiment is the amount of chemicals (in teaspoons) added to each cup of water, while the dependent variable is the temperature of the water before and after the experiment, and the constant will be the cup of water that will have no chemicals added.
If one teaspoon of ammonium chloride, calcium chloride, and sodium chloride are added to separate glasses of water, then ammonium chloride will keep the water cold the longest because it is most commonly used in brand name cold packs. In order to test the hypothesis, the scientists will label four cups to keep track of what chemical will go in each cup. One will just be plain water, while the next will be labeled ammonium chloride, calcium chloride, etc. Then the scientists will pour fifty mL of water into each cup and measure the temperature of the water in each cup. The scientists will then add one teaspoon of each chemical into the corresponding cup. …show more content…
Robbins and it was originally made for food but now a similar design is used to treat bruises and other similar wounds. Robbins created the chemical freezing package when he accidentally mixed ammonium nitrate and water and witnessed and endothermic reaction. A modern instant cold pack is a device that consists of two bags; one containing water, inside a bag containing ammonium nitrate, calcium ammonium nitrate or urea. When the inner bag of water is broken by squeezing the package, it is allowed to dissolve the solid in an endothermic reaction. An endothermic reaction is a process where something absorbs energy that is usually in the form of