Calculate the final equilibrium temperature
A 30-kg aluminum block initially at 140 C is brought into contact with a 40-kg block of iron at 60 C in an insulated enclosure. Determine the final equilibrium temperature and the total entropy change for this process.
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Assume ends of bar in 5-7 have been kept constanst at 100 degrees C for a long time. Then at some instant t=0 the temperature at x=L is suddenly changed to 0 degree C and kept there.
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