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midterm 1

# midterm 1 - EML 5104 Classical Thermodynamics Spring 2010...

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EML 5104 Classical Thermodynamics, Spring 2010 Mid Term Test, 3 March 2010 Name (Print): _________________________ UF-ID: ________________________________ Please sign the honor pledge: "On my honor, I have neither given nor received unauthorized aid in doing this assignment." _________________________________ Signature Please use attached pages for solution. Only write on one side of paper. Problem 1 A piece of metal (0.25 kg), initially at 1100 K, is quenched by immersing it in a rigid, closed tank containing 20 kg of water, initially at 300 K. The metal and water can be modeled as incompressible substances with constant specific heats. The specific heat of water is c w =4.2 kJ/(kg K) and the specific heat of the metal is c m =0.45 kJ/(kg K). After some time, the system reaches thermal equilibrium ( T w = T m = T ). Hints: Neglect heat transfer from the tank to the surroundings. Neglect kinetic and potential effects. Pressure and volume remain constant. Assume T 0 = 293 K. a)

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midterm 1 - EML 5104 Classical Thermodynamics Spring 2010...

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