Chemical Reactions And Energy Changes - 1712 Words

Theory: It is stated that all chemical reactions involve energy changes. Where a substance is stored with chemical energy and has the potential to be converted to heat. Exothermic and Endothermic reactions are included in the changes in heat of energy. As Exothermic reactions release heat, and transfer the temperature to its surroundings. This is because the energy absorbed to split the bonds of the reactants release less heat energy than the product made by the bonds. An endothermic reaction however absorbs heat from its surrounding as the reactant doesn’t supply enough energy therefore it absorbs energy from its environment. In addition, endothermic reactions release more heat energy in order to break the bonds made by the products. The bonds in the exothermic and endothermic occur during the experiment, as the breaking and making of the chemical bonds are involved. Exothermic is energy that is released when any chemical bond is formed and Endothermic is energy which must be added when a chemical bond is broken. It is recognized that with exothermic reactions, the products will contain a lower energy with the reactants. Endothermic reactions however have products which contain a higher energy than the reactants. This is because exothermic reactions release heat, and in the progress contain less energy with the products. As opposed to Endothermic reactions, where it absorbs the energy, bringing the products to a greater number. Activity A and C are expected to have anShow MoreRelatedChemical Reactions Of Energy And How It Changes Essay938 Words   |  4 Pages Thermochemistry deals with energy and how it changes. We performed chemical reactions in a calorimeter, which is a device scientists use to determine the amount of heat produced by a process (or change). Processes that absorb energy are endothermic and processes that release energy are exothermic. Endothermic, processes that absorbed energy produced positive results. Where as, exothermic, processes that release energy produced negative results. This experiment also dealt with specific heat. SpecificRead MoreGummy Bear Experiment1159 Words   |  5 PagesGummy Bears Energy is a concept.ï ¿ ½ Most definitions of the word energy fail to provide its exact meaning when applied to scientific matters.ï ¿ ½ In science the word energy is a concept that expresses two measurable properties, heat and work.ï ¿ ½ Here is the relationship of energy, heat and work: Energy Released=Work Done + Heat Released The Law of Conservation of Energy, derived from centuries of observation and measurement, indicates that energy cannot be created or destroyed. But energy need not stayRead MoreHeat Of Combustion Using Hydrocarbons As Fuel1219 Words   |  5 Pagesusing hydrocarbons as fuel. All three fuels produce combustion reactions which are exothermic. When bonds are formed or broken the most common form of energy released or taken in is heat energy. Heat of combustion is a way of measuring how much energy is output from a combustion reaction, the energy that is output is usually in the form of heat. Figure 1. Combustion reaction of methane (middleschoolchemistry.com) When a combustion reaction takes place it is when a liquid (typically a hydrocarbon) getsRead MoreThe Six Branches Of Chemistry1482 Words   |  6 Pagesbranches of chemistry ORGANIC CHEMISTRY Organic chemistry involves the study of the structure, properties, and preparation of chemical compounds that consist primarily of carbon and hydrogen. organic chemistry the study of most carbon containing compounds INORGANIC CHEMISTRY Inorganic chemistry is the study of the properties and behaviour of inorganic compounds. It covers all chemical compounds except organic compounds. 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After completing the experiments we were able to tell what chemicals or metals would change the heat energy for every reaction we tested. Overall, this experiment showed us what characteristics of chemical reactions affect the change in temperature, enthalpy, and specific heat. Read MoreInvestigating The Chemical And Physical Changes Throughout The Experiment1435 Words   |  6 PagesProblem: The purpose of this particular lab was to experiment and identify the chemical and physical changes throughout the experiment. Material: Refer to Science Activity 8.1 – Evidence of Reactions Worksheet Procedure: Refer to Science Activity 8.1 – Evidence of Reactions Worksheet, page #1-6 Observations: Original Temperature of H2O (Water): Using a thermometer we observed the measurement of the water â€Å"H2O† in the beaker, and it resulted in an initial temperature of 20 ⠁ ° C. CuCl2 (CopperRead MoreHow an Acid (Coke) Can React Together with Potassium to Create a Charger for an iPone1477 Words   |  6 PagesWith both potassium and acid working together, they will give off energy to the iPhone. Why Coke? Every liquid will be either acidic or basic traits. An acid-base reaction is a chemical reaction that happens between an acid and a base. There are multiple definitions when considering the reaction mechanism when solving problems. Regardless of what the problem is, it’s always a known fact that when using liquid or gaseous reactions, they become less apparent. You want to use Coke because its pH isRead MoreModule 4 DBA notes966 Words   |  4 Pagesï » ¿A physical change is one that affects only the physical properties of a substance, while a chemical change alters a substance at the molecular level. Physical Properties: A property that can be observed or measured without changing the chemical identity of the substance. Physical properties can be categorized as either intensive or extensive. Reactivity: An element or compound’s reactivity is its ability or capacity to react, or bond, with another substance. As you continue through this courseRead MoreDetermination of Acetic Acid in Vinegar Lab Report Essay749 Words   |  3 Pagesintended to display that chemical reaction and phase changes involve energy. The energy of heat was presented when a change in temperature difference was evaluated. Chemical reactions in a calorimeter were used to determine the amount of heat produced by a reaction. Reactions that absorb heat were noted as endothermic, and reactions that release heat were noted as exothermic. These principals were based off of Hess’s Law. The goal of the experiment was to monitor chemical reactions using a calorimeter