Using The Heat Energy Equation - 1804 Words

INTRODUCTION (Pre-lab) What will be the amount of energy contained in specific snack foods? This question will be solved by using the heat energy equation, Q=mCΔT. â€Å"Q or q† will represent the heat in joules, this will be found algebraically by filling in the rest of the heat energy equation. â€Å"m† will represent the mass in grams, this will be found by finding the mass of the water. â€Å"C† will represent specific heat in Joules/grams  °Celsius, the specific heat of water will always be 4.184 J/g °C. â€Å"ΔT† will represent the change in temperature, this will be found by subtracting the final temperature of the water by the original temperature of the water. Capital Q means that heat will be added-endothermic. Lowercase q means that heat will be lost-exothermic. The law conservation of energy says that energy will not be created nor destroyed, but will be converted from one form to another. The percent error equation will be (accepted-experimental) à · (a ccepted), accepted is the Cal/g on the snack food’s package, and the experimental is the Cal/g that is calculated during the experiment. The independent variable will be the Marshmallow, CHEEZ-IT, Cheetos, and Chex-mix. The dependent variable will be the energy in either Joules/grams or Calories/gram because the amount of energy depends on the snack food. The controlled variable will be the amount of water in the calorimeter because the water will be the same amount in every trial. A bar graph will be needed to determine which snack foodShow MoreRelatedA Brief Look at Desalination1345 Words   |  5 Pageschecks on all coursework using plagiarism software. Name: Oluchi Eziuche Emenike Date: 2nd May, 2014 Summary (max 250 words) The design project was about a desalination process making use of superheated steam from the solar system as electricity and using waste heat in the heat exchangers to produce pure water which can be used for domestic activities. Basic data was provided and some assumptions were made to aid the mass and energy balance. After the mass and energy balance was completedRead MoreBackground Paper Have you ever been sitting there and just wondered about various things dealing1100 Words   |  5 Pageswhat it actually is, how to write a calorimetry equation, and even what a calorimeter is and how to use one. Time to start off calorimetry in the best way: with the definition: because you should know what it is before learning other stuff about it. Calorimetry is the quantative measurement of the heat required or evolved during a chemical process and is just a general term for anything to do with this including finding the heat required to the equations used to figure everything out. Now that you knowRead MoreCHM130Lab 4CalorimetryName Mengqi LiData Table 12 Essay1499 Words   |  6 Pagesthe water by using the water’s density (specific to the initial temperature) and the volume of the water. Remember, density = mass/volume. You can look up the density of the water at your specific temperature at http://www.ncsu.edu/chemistry/resource/H2Odensity_vp.htmï ¾ §l. (5 points) Mass=density*volume=0.9987779*75=75g 4. Use the equation: q = m(SH)ΔT to solve for the amount of heat gained by the water from metal. You have the mass of water from calculation #3, the specific heat of water isRead MoreEnthalpy Lab Report Essay1245 Words   |  5 PagesAbstract This lab is performed in order to determine the total energy in a reaction between zinc and hydrochloric acid. The reaction is done twice, once to measure the heat of the reaction and again to determine the work done in the system. This is because Enthalpy equals heat plus work (∆H= ∆E+W). Heat and work can be broken down further into separate components so the equation used in lab is ∆H=mc∆T + PV. Many calculations are used in the lab to find out what cannot be measured directly (ex:Read MoreThermodynamics Of Mixing Of Poly Essay732 Words   |  3 Pagespolymers and the mixtures are investigated in terms of specific heat as well. The mixing of PVC and EVA are investigated because of the possible use of EVA as a plasticizer for PVC. The benefit of an EVA plasticizer would not having the need to introduce low molecular plasticizers [1]. This paper will explore the enthalpy of mixing found throughout the various mixtures and the indications of these values as well as the excess specific heats. Some applications of EVA as a plasticizer is also exploredRead MorePhysics Lab Report1059 Words   |  5 Pages| Specific Heat Capacity of Brass | | Jin Jin Shi | 2012/12/6 | Instructor: Mr. Nailer | I. Introduction The amount of heat required to raise the temperature of a solid body depends on its change in temperature (ΔT), its mass (m), and an intrinsic characteristic of the material forming the body called specific heat (cp). The heat is calculated from the equation II. Purpose The purpose of this laboratory is to determine the experimental quantities of heat transfer andRead MoreA Brief Look at Hypersonic Flight1539 Words   |  6 Pagesvehicle which is detached from its nose. It is subjected to wide range of pressure, heat transfer and shear levels. The shock encounters the conversion of a large amount of kinetic energy into thermal energy. This large energy density results in high temperature of the gas mixture where dissociation and ionization takes place. The plasma flow is created which impinges on the vehicle wall. To sustain this immense amount of heat transfer the space craft must be equipped with suitable Thermal Protection SystemRead MoreThe Heat Of Combustion Of Magnesium Using Hess s Law859 Words   |  4 PagesCalorimetry and Hess’s Law Experiment 10 CHEM 117-515 Samantha Miller* and Emily Duff Summary: The purpose of this experiment was to determine the heat of combustion of magnesium using Hess’s Law. This experiment was significant in understanding how heat can be absorbed or released and how using a calorimeter can help measure heat flow. Part A of this experiment used two dry Styrofoam cups and a magnetic stir bar to create a calorimeter. Temperature was measured and distilled water was placed intoRead MoreComponents Of Thermoregulation ( Tm ) Systems And The Latent Thermal Energy Storage ( Ltes ) Essay1375 Words   |  6 Pageslatent thermal energy storage (LTES). PCMs capability to absorb and release large latent heat during phase change transition processes provides a wide range of phase change temperatures for thermal management systems. The incorporation of PCMs can achieve the same or even better performances with a smaller volume. PCMs can meet the thermoregulation requirements of various applications. Currently, the low thermal conductivity of PCMs (usually les s than 1 W mK−1) greatly limits their heat dissipationRead MoreA Physics Special On Mass Energy Equivalence718 Words   |  3 PagesGreat Lakes Tribune A Physics Special on Mass-Energy Equivalence Article By: Hugh Corley History Born in Germany in 1879, Albert Einstein was theoretical physicist. After graduating high school, he began working in a Swiss patent office in 1903. 1905 was like any other year in the patent office. That is, until September 27, when Albert Einstein finished a paper that would revolutionize physics. Titled â€Å"Does the Inertia of a Body Depend Upon Its Energy-Content?† it was the final paper in a series