Exothermic

An exothermic reaction gives off energy in the form of heat, light or sound and can occur spontaneously. When used in a laboratory exothermic reactions may generate heat or even an explosive. In the other hand, an endothermic reaction absorbs energy and cannot occur spontaneously. When heat is absorbed a temperature drop and is measured throughout the reaction. Endothermic reactions have a positive heat flow while Exothermic reactions have a negative heat.(Patel…

to the copper wire (Cu), the brown NO2 gas was emitted from the solution. As the copper wire dissolved, the solution green and eventually blue. Once the reaction was complete, the solution ceased to emit gas. It was evident that the reaction was exothermic since the beaker was hot, indicating that there was…

The topic for the experiment is how a cold pack can be improved. The problem statement is “Which chemicals would work best at lowering the temperature of water to improve a cold pack?”. The Independent variables are the are three chemicals, ammonium chloride, sodium chloride, and calcium chloride, that will be added to the water. The dependent variable is the temperature of the water in degrees Fahrenheit after the chemicals are added. The constants are the 50 mL of water in each cup, the…

monohydrate (LiOH•H2O) is first formed by the exothermic reaction. An exothermic reaction is a chemical reaction that releases energy in the form of light or heat. In this reaction it is the reaction between lithium hydroxide and water vapour to form lithium hydroxide monohydrate. LiOH(s) + H2O(g) LiOH•H2¬O(s) This reaction is followed by the endothermic formation of lithium carbonate. An endothermic reaction is the exact opposite of an exothermic reaction in which in an…

Endothermic: a type of reaction which has energy going into the reaction, however, it uses more energy than it releases in the reaction. Exothermic: a type of reaction that has energy coming out of the reaction, therefore more energy is released than used in the reaction. Propanol: a transparent/colorless liquid used as a solvent and antiseptic. Calorimeter: an apparatus for measuring the amount…

The great and evil Winter is going to take of the magical education government at OSU. He’s a rather hard target to defeat, since he’s a shapeshifter, and so far he’s succeeding at his goal. Anyways, two dragons, Moon and Sephira, are sitting in the middle of their very last class only half watching the presentation going on. And the presentation is Moon’s illusion, so technically, Moon is watching only half-watching herself try to earn a degree after 8 years of school for a chemistry PhD. The…

Based on the results I got, the smaller the animal was the lower the mean LDH activity was. Another factor that can affect the LDH levels in a species could be where the animals live. Lizard-fish, which had the highest mean LDH activity, tend to live in shallow and deep waters all around. They like to burry themselves in sand or mud on the bottom and not move until prey comes along. My group’s hypothesis was incorrect, croaker fish did not have the highest LDH activity. Lizard-fish and croaker’s…

This data supports my hypothesis by showing that both reaction two and three lose energy and are exothermic. A deviation that occurred was a miscalculation during the experiment in which my partners and I measured the change in temperature at the wrong time which upon correction the data was not much different. The results follow the theories that have…

household, car, office and even laptops and electronics have air conditioning which has allowed for appealing aspects of commercial use and consumer consumption, but what we don 't consider is how it uses heat, and the absence of heat to facilitate the exothermic and endothermic reactions to do work. Air conditioning controls humidity, ventilation and temperature, creating a fresh ambiance in warmer weather. It requires scientific topics which…

In this experiment, the Law of Conservation of Mass was illustrated by performing a series of 5 reactions, including a precipitation reaction, a decomposition reaction, two redox reactions, and an acid base reaction on a copper wire, called the Copper Cycle. The initial and final mass of the copper were measured and percent recovery was calculated to demonstrate that mass wasn’t created or destroyed. The balanced equations, balanced formula-unit equations, total ionic equations, net ionic…