Introduction: Cold compresses or medical cold compresses are made and used in a variety of different ways. Cold compresses are generally used when it comes to medical treatment. Many athletes used cold compresses to heal injuries. Additionally, cold compresses are used to keep medications cool for a certain period, including vaccinations. Cold compresses contain a liquid inside, in most cases it is water. Additionally the water is mixed with salt, which allows the cold compress to stay cool. The mixture that forms between salt and water causes an endothermic reaction, i.e. heat is absorbed. Due to the absorption of heat, the temperature of the solution will decrease substantially. The laboratory of experiments with cold compresses allowed us students to apply the theories learned in class to real experiments; such experiments prepare us for future tasks to be determined. Our main path through this assignment was to determine what our unknown salt was, through experimental analysis. The main purpose of this lab was to determine which unknown salt is indicated. For this experiment, I and my group were given unknown salt 7. Information acknowledged before starting the lab, what materials were needed, basic information on the mathematics required to determine the unknowns. Additionally, other background sources before starting the experiment included prior knowledge of chemical formulas, understanding concepts learned in lectures, and how calorimetry works. Additionally, to determine how to complete the lab, we needed information on how to properly maintain the water temperature so that the water temperature would not decrease or increase, and this required knowing what an insulator is and how to use it. ... . middle of paper .......edu/chemistry/docheConclusion:In conclusion, this experiment allowed us students to use the theories learned in class for real-life applications, or real-life applications that we will soon encounter. The lab better prepared us for what we might expect in the future and allowed us to determine several factors that influenced our results in more ways than one possible. The cold compress laboratory experiment conducted by me and my group led us to face errors such as measurement errors, errors including the calorimeter, and errors including our unknown salt. These errors have been recorded and explained to help us prevent them from happening again. By following the correct procedure and having the correct materials required, we were able to determine the final enthalpy. This allowed us to determine what our unknown salt was, namely ammonium chloride.