LECTURE 7 GRAPHICAL REPRESENTATION OF DATA 1. Pressure versus temperature (P-T) 2. Pressure vs. volume (P-v) 3. Temperature vs. volume (T-v) 4. Temperature vs. entropy (T-s) 5. Enthalpy vs. entropy (h-s) 6. Pressure vs. enthalpy (P-h) The term saturation temperature designates the temperature at which vaporization takes place. For water at 99.6 C the saturation pressure is 0.1 M Pa‚ and for water at 0.1 Mpa‚ the saturation temperature
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energy‚ or Gibbs free energy. The equation (1) gives the relationship of how entropy (∆S) and enthalpy (∆H) along with temperature affects the amount of free energy‚ and henceforth the spontaneity. A spontaneous process may be quick or slow‚ and it is only affected by temperature and energy‚ therefore it is not related to kinetics or reaction rate. equation (1): If entropy is less than enthalpy‚ the enthalpy term determines if the reaction
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International Journal of Engineering Research and Applications (IJERA) ISSN: 2248-9622 National Conference on Emerging Trends in Engineering & Technology (VNCET-30 Mar’12) Theoretical and Experimental Evaluation of Vapour Absorption Refrigeration System V.D.Patel*a‚ A.J.Chaudhari*‚ R.D.Jilte* (Department of Mechanical Engineering)* Vidyavardhini’s College of Engineering and Technology‚ Vasai (W)‚ Dist: Thane‚ Pin: 401 202‚ (M.S.)‚ INDIA. e-maila: v_patel@rediffmail.com ABSTRACT The vapour
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Air Conditioning Psychrometrics Course No: M05-005 Credit: 5 PDH A. Bhatia Continuing Education and Development‚ Inc. 9 Greyridge Farm Court Stony Point‚ NY 10980 P: (877) 322-5800 F: (877) 322-4774 info@cedengineering.com AIRCONDITIONING PSYCHROMETRICS AIR CONDITIONING PSYCHROMETRICS In air-conditioning system‚ the air must undergo one or several of the following processes: Psychrometrics can be used to predict changes in the environment when the amount of heat and/or
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WJEC CBAC AS/A LEVEL GCE in Chemistry REVISION AID UNIT 1 AS UNIT CH1 – Controlling and Using Chemical Changes (in order to make things‚ produce energy and solve environmental problems) Preamble This unit begins with some important fundamental ideas about atoms and the use of the mole concept in calculations. Three key principles governing chemical change are then studied‚ viz. the position of equilibrium between reactants and products‚ the energy changes associated with a
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Nano-scale Phase Change Materials (PCM’s) and Their Effect on Heat Transfer Fluids Sean Schulte‚ Chaoming Wang‚ Ming Su 1NanoScience Technology Center‚ 2Department of Mechanical‚ Materials‚ and Aerospace Engineering‚ University of Central Florida‚ Orlando‚ Florida 32826. mingsu@mail.ucf.edu Abstract: Introduction: Heat transfer fluids (HTF’s) are often used as carriers in heat transfer equipment. It therefor comes as no surprise that finding a way to make HTF’s more efficient is desirable
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forms of energy Thermochemistry is a branch of thermodynamics that deals with the heat involved with chemical and physical changes Objectives 1. Define thermodynamics & thermochemistry 2. Define energy‚ heat and other thermodynamic terms 3. Define enthalpy 4. Discuss thermochemical equations 5. Define spontaneity‚ entropy and Gibb’s free energy Why study thermochemistry? • • it allows us to predict whether a certain process would occur spontaneously or not however‚ its limitations is that‚ it can
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branch of physical science that involves the relationship between heat and other forms of energy (Energy‚ Enthalpy‚ and the First Law of Thermodynamics). There is a more specific area of thermodynamics that explicitly pertains to chemical reactions. The Gibbs free energy (ΔG°) is a chemical variable that expresses the balance between thermodynamic properties‚ known as enthalpy and entropy. Enthalpy is the heat absorbed or releases from a system and entropy is the measurement
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Chapter 15 (not much on E) Thermodynamics: Enthalpy‚ Entropy & Gibbs Free Energy Thermo 2 Thermodynamics: thermo = heat (energy) dynamics = movement‚ motion Some thermodynamic terms chemists use: System: the portion of the universe that we are considering open system: energy & matter can transfer closed system: energy transfers only isolated system: no transfers Surroundings: everything else besides the system Isothermal: a system that is kept at a constant temperature
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Experiment 9 Aim A. To investigate the existence of hydrogen bonds between ethanol molecules. B. To measure the strength of hydrogen bond formed between ethanol molecules C. To investigate the formation of hydrogen bonds between molecules of ethyl ethanoate and trichloromethane. D. To measure the strength of hydrogen bond formed between molecules of ethyl ethanoate and trichloromethane. Procedure A. 1. 10 cm3 of ethanol was added into an insulated 50 cm3 beaker by
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