Exothermic reaction

lab was conducted to find the key differences between the quantity of heat (q) and ∆H of a substance. Different masses of substances CaCl2 and NH4NO3 were dissolved in water to see how changing mass impacts the q and ∆H of a substance. When the two substances dissolve, they become ions. CaCl2 dissolves in a reaction of: CaCl2 Ca2+aq + 2Cl1-aq while NH4NO3 dissolve in a reaction of: NH4NO3 NH41+aq + NO31-aq . As shown in these reactions, when ionic compounds dissolve in water, they break into their individual charged ions. The compounds are held together through ionic bonds, but when they dissolve, ionic bonds are broken and ion dipole attractions form instead. This change in bonding indicates that there is a change in energy, which can create endothermic or exothermic reactions. Endothermic reactions are those when energy is drawn into the system in order to perform the reaction, while exothermic reactions are those when energy is released into the surroundings. Exothermic reactions are caused when the ionic bonds have more energy than those of the ion dipole attractions, so they give off energy after the substance is dissolved. In this lab, this is shown through the reaction of CaCl2 Ca2+aq + 2Cl1-aq.…

In our experiment, to look deeper into exothermic reactions, we first had to create our own calorimeter. We did this using 3 separate 8 ounce Styrofoam cups, one for each compound. We then used cardboard to create a lid for each cup and taped it to the sides so the seal would be as tight as we could make it. We also needed a 150mL beaker to measure out the 50 mL of distilled water that we used in each trial to dissolve each compound in. To weigh out each compound we also needed an electronic…

Energy profile of exothermic reaction Energy profile of endothermic reaction A)Doc Brown (2016) B)Doc Brown (2016) Thermodynamic reactions occur when there is a difference of energy during a chemical reaction. There are two types; Firstly, Exothermic reactions; This is when the initial reactants use less energy to break their existing bonds, than what energy was required to make the new bonds. The extra heat is spreads out into the surroundings (see above diagram A) An…

experiment is to show the student how the amount of energy in a substance can change via endothermic reactions and, in this experiment, exothermic reactions. This experiment hopes to show the student a simple exothermic reaction that will serve as a building block for all future exothermic reaction. So what exactly is an exothermic reaction? Well, many chemical reactions release energy in the form of heat, light, or sound. These are exothermic reactions (Helmenstine). An exothermic reaction…

This reaction was an exothermic process as it yielded a heat change of ∆H= -1316.700J. The final reading of the thermometer displayed an increase of temperature from its initial temperature which is an indication of heat being released as in an exothermic process. The molar enthalpy change was calculated to be -65.835Kj/mole while the theoretical calculation is -55.800Kj/mole. The information yielded a percent error of 17.984% which can be explained by a possible inaccurate reading of the…

In problem one, we were simulating an ammonia production by reacting nitrogen and hydrogen in a reaction called Haber process. Haber process is a very economic exothermic reaction to produce ammonia by reacting nitrogen and hydrogen using a metal catalyst in high pressure and temperature. Nitrogen was obtained from the air and therefore, some argon would be included in this simulation. On the other hand, hydrogen was obtained from the cracking of petroleum. The simulation process started where…

It was noted that the system malfunctioned during the procedure. The CSB notes that the failure could have been a valve failure or blockage in the water piping used to cool the vessel. Since vessel could not be cooled, the pressure inside the vessel began to rise and chemical runaway began to occur. Chemical runaway is the process that exothermic reactions get out of control and cause an explosion (Institute of Chemical Engineers, n.d.). During the evacuation process, the pressure became too…

How the changing mass of solute effects the heat given out when dissolved in water Aim To investigate how the changing mass of a solute will affect the energy given out. Introduction Dissolving is when a solute is mixed into a solvent to form a solution. Dissolving can be either endothermic or exothermic. Endothermic reactions happen when the energy given out when bonds are broken, is greater than the energy given out when bonds are made. As more energy is used and taken in, the surroundings…

Endothermic or Exothermic? The energy changes lab was an interesting lab in which the class compared two chemical reactions, the solute baking soda and the solvent vinegar, and the solvent baking soda solution with the solute of calcium chloride to see whether the changes were endothermic or exothermic reactions. I concluded that vinegar and baking soda was the endothermic reaction and baking soda solution and calcium chloride was the exothermic reaction. I knew this because in the vinegar and…

conclude that the reaction with the fastest reaction rate is magnesium and hydrochloric acid. Initially, it was hypothesized that the reaction with hydrochloric acid would have the fastest reaction rate due to its high acidity observed from the pH scale. From there, the following reactions were based on the pH of the acid involved as well as the concentration of hydrogen ions/atoms within the acid molecule. As a result, it was hypothesized that the sulfuric acid reaction would be the second…