Lesson1- Laws of Thermodynamics Annette Tyler Laws of Thermodynamics Thermodynamics is the study of energy‚ the conversion of energy to various forms and the ability of energy to do work. The term ‘Thermodynamics’ originate from two root words ‘thermo’ which means heat and ‘dynamic’ which means power. The laws of thermodynamics are absolute and the observable universe obeys the Laws of Thermodynamics. The First Law of Thermodynamics is commonly known as the Law of Conservation of Matter
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COMSATS – LANCASTER (Dual Degree Program) EEE-112 Engineering Mechanics and Thermodynamics Assignment # 1 Submission date: Mon‚ Sep 17‚ 2012 1. A certain fluid at 10 bar is contained in a cylinder behind a piston‚ the initial volume being 0.05 m3. Calculate the work done by the fluid when it expands reversibly: a. at constant pressure to a final volume of 0.2 m3; b. according to a linear law to a final volume of 0.2 m3 and a final pressure of 2 bar; c. according to
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Atmospherics is a technique of how stores or restaurants used to make customers be less rational in their buying spree. In Rushkoff’s reading‚ “Atmospherics”‚ it describes the behaviors of customer in the designs of atmospheric in the store. The author introduces several techniques which implied to the strategy of atmospheric‚ such as floor plan‚ temperature‚ and lighting. According to Rushkoff’s idea of atmospheric‚ atmospherics have several designs for the promotion in store or restaurant. For
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device has a resistance R0 = 100 Ω at 0o C. If the resistance RT = 197.7 Ω in an oil bath‚ what is the temperature of the oil in the bath‚ given that RT = R0(1+αT)? Take R0 = 100 Ω R0 = resistance at 0o C α = 3.9083 x 10-3 /o C (2 marks) NDE Thermodynamics and Heat Transfer Exam 2008 Name: _______________________________________ Read all the instructions before starting Do not open this paper until instructed Time allowed: 2 hours (plus 5 minutes reading time) Attempt ALL question in Section A
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Corollary 1: The clausius statement of second law of thermodynamics is the first corollary i.e. ‘It is impossible to construct a device operating in a closed cycle that performs no effect other than the transfer of heat from a cooler body to a hotter body.’ The mathematical statement of which is given by; Q1‐Q2=W Q1 W Q2 Corollary 2: It is impossible to construct an engine operating between only two heat reservoirs‚ which will have a higher efficiency than a reversible heat engine operating between
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First Law-Exercise: Problem 1: A volume 10 m3 contains 8 kg of oxygen at a temperature of 300 K. Find the work necessary to decrease the volume to 5 m3‚ (a) at a constant pressure and (b) at constant temperature. (c) What is the temperature at the end of the process in (a)? (d) What is the pressure at the end of process in (b)? (e) Show both processes in the p-V plane. Problem 2: The temperature of an ideal gas at an initial pressure p1 and volume V1 is increased at constant volume until the pressure
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PRINCIPLES‚ CONCEPTS AND DEFINITION OF THERMODYNAMICS OBJECTIVES The study of this lesson will enable the students to: 1. define thermodynamics and other terms necessary in the study of thermodynamics; 2. know the approaches in the study of thermodynamics; 3. state the difference between dimension and unit; 4. explain the different thermodynamics system; 5. differentiate homogenous system to a non homogenous system; 6. know the different thermodynamic properties and state of the system;
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5-1 Chapter 5 MASS AND ENERGY ANALYSIS OF CONTROL VOLUMES Conservation of Mass 5-1C Mass‚ energy‚ momentum‚ and electric charge are conserved‚ and volume and entropy are not conserved during a process. 5-2C Mass flow rate is the amount of mass flowing through a cross-section per unit time whereas the volume flow rate is the amount of volume flowing through a cross-section per unit time. 5-3C The amount of mass or energy entering a control volume does not have to be equal to the amount
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Introduction In this lab‚ the purpose was to verify Hess’s Law. Four main topics were covered during this experiment including enthalpy of reaction‚ heat of formation‚ Hess’s Law‚ and calorimetry. The enthalpy of reaction‚ ΔHrxn is the heat or enthalpy change for a chemical reaction. The energy change is equal to the amount of heat transferred at a constant pressure in the reaction. The change represents the difference in enthalpy of the products and the reactants and is independent of the steps
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