in Chemistry Laboratory Instruction LEARNING OBJECTIVES The learning objectives of this experiment are to. . . ! ! determine changes in enthalpy and entropy of the reaction of zinc with copper sulfate using two methods: electrochemistry and calorimetry. compare the enthalpy values obtained by the two methods. BACKGROUND Thermodynamics is concerned with energy changes that occur in chemical and physical process es. The enthalpy and entropy changes of a system undergoing such processes are interrelated
Premium Electrochemistry Enthalpy Thermodynamics
Joseph Corey‚ Chris‚ Grant Thermodynamics – Enthalpy of Reaction and Hess’s Law I. Purpose The purpose of this lab is to verify Hess’s Law through the three reactions of NaOH and HCl‚ NH4Cl and NaOH‚ and NH3 and HCl. The sum of the enthalpies of the first two reactions should equal the enthalpy of the third reaction. II. Background Hess’s Law is used to determine the enthalpy of a reaction from adding two or more preceding reactions. To determine the enthalpies of certain
Free Enthalpy Thermodynamics Temperature
Medical Cold Packs- Thermochemistry Experiment 2.1 Purpose: To use calorimetry to determine the enthalpy of solution of an unknown salt‚ and then to use that value to identify the salt in the medical cold pack. Materials: See handout Procedure: 1. Acquire two styrofoam cups‚ and cut the top off one of them. 2. Add 80mL of water and record it’s initial temperature. 3. Place 10g of salt into the water and put second on top‚ creating a seal. 4. Record the temperature
Premium Energy Temperature Thermodynamics
secret to prevent interference from third parties. It inhibits third-party software from being installed; it keeps third-party hardware from interoperating with it‚ and it prevents third-party enhancements from improving the product. EXAMPLES: Calorimetry experiments often use a closed system‚ especially bomb calorimeters. Most experiments in chemistry are conducted as closed systems. DIFFERENTIATION BETWEEN OPEN AND CLOSED SYSTEM OPEN SYSTEM: A system that receives inputs of energy and matter
Premium Thermodynamics Open source Systems theory
| Experiment 2 | Calorimetry | | Chemistry 1310 | 7/21/2013 | | This experiment is to calibrate a constant pressure calorimeter to experimentally determine a series of heats of reaction that will be used to predict the enthalpy of reaction for another reaction using Hess’ Law and to determine heats of dissolution for a number of ionic salts that will be used to predict lattice energy again by using Hess’ Law. Heat may increase during experiment and undergo exothermic reaction
Free Thermodynamics Enthalpy Measurement
Bibliography: "Calorimeters and Calorimetry." The Physics Classroom. The Physics Classroom‚‚ n.d. Web. 08 Oct. 2014. "Definition of Calorimetry." Chegg. Chegg Inc‚ n.d. Web. 10 Oct. 2014. Leon‚ Nelson De. "Specific Heat." IUN. N.p.‚ n.d. Web. 07 Oct. 2014. Mycheme. "MyChemE." MyChemE. Wordpress‚ 31 Aug. 2013. Web. 08 Oct. 2014.
Free Thermodynamics Temperature Enthalpy
that relates to chemical reactions and energy changes involving heat. Most thermochemical studies are conducted in a laboratory where the transfer of heat can be carefully monitored in a closed system. The measurement of heat transfer is called calorimetry. The device in which heat transfer is measured is called a calorimeter. A calorimeter can be a sophisticated device that isolates the reaction from its surroundings or it can be a simple device in which the reactants are in constant‚ close physical
Free Thermodynamics Temperature Heat
to understand the difference between heat and temperature‚ and make some quantitative measurements concerning both. We used the technique called calorimetry to measure the specific heat. Calorimetry‚ it is the process of measuring quantities of heat. The purpose of the calorimeter is to prevent heat lose to the surroundings (Leybold 2000). Calorimetry is literary “the measurement of heat content”. In this experiment‚ a certain amount of hot water‚ at a particular temperature‚ is poured into the
Free Thermodynamics Temperature Heat
2013/07/09 Lecture Presentation Chapter 5 Thermochemistry John D. Bookstaver St. Charles Community College Cottleville‚ MO © 2012 Pearson Education‚ Inc. Energy • Energy is the ability to do work or transfer heat. – Energy used to cause an object that has mass to move is called work. – Energy used to cause the temperature of an object to rise is called heat. Thermochemistry © 2012 Pearson Education‚ Inc. 1 2013/07/09 Kinetic Energy Kinetic energy is energy an object possesses
Premium Energy Enthalpy Thermodynamics
• Nanomaterial synthesized • <d> 100 to 300 nm in width • Particles are rod shaped. • Homogenous. • Particles length > 1µ Characterization TGA- Of Sample Characterization: Differential Scanning Calorimetry Differential Scanning Calorimetry was carried out on the sample. The following was observed: • Dip in the 50 to 200 range for the dehydration process. This confirms the initial TGA plot • Change at the higher temperatures due to transformation of FePO4 from amorphous
Premium Chemistry Electron Atom