ch20-p011 - 11. (a) We refer to the copper block as block 1...

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() ( ) ( ) ( ) ( ) ( ) ( ) 11 , 1 2 2 , 2 11 2 2 + 50.0 g 386 J/kg K 400 K + 100 g 128 J/kg K 200 K + 50.0 g 386 J/kg K + 100 g 128 J/kg K 320 K. ii f mcT T mc ⋅⋅ == = (b) Since the two-block system in thermally insulated from the environment, the change in internal energy of the system is zero. (c) The change in entropy is ( ) ( ) 12 1 1 2 2 ,1 ,2 =+= l n + l n 320 K 320 K = 50.0 g 386 J/kg K ln + 100 g 128 J/kg K ln 400 K 200 K 1.72 J K. ff TT SS Sm
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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