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The change in entropy of the system when the temperature is raised at constant volume is given by equation DS = C vln(T f/T i) 3. 15.2: The First Law of Thermodynamics and Some Simple Processes. This is the currently selected item. In symbols: dU = dQ + dW. 1. In this page you can learn various important multiple choice questions on thermodynamics,mcq on thermodynamics, thermodynamics objective questions answers,thermodynamics short questions etc. Other approaches can also be correct and could lead to slightly different numerical answers. BASIC CONCEPTS AND FIRST LAW . • =Pressure, =Volume, =number of molecules, . Learn the concepts of Thermodynamics, first law of thermodynamics, 2nd law of thermodynamics and entropy with the help of solved examples for IIT JEE by askIITians. =Boltzmann’s constant, =temperature [in K] • 2. nd. Yes, as long as the work done equals the heat added there will be no change in internal energy and thereby no change in temperature. 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