ch20-p020 - 20. (a) We denote the mass of the ice (which...

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(d) Similarly, the cooling of the original-water involves an entropy change of 339.67 353.15 ' 339.67 'ln 21.2 J/K 353.15 cm dT cm T §· == ¨¸ ©¹ ³ (e) The net entropy change in this calorimetry experiment is found by summing the previous results; we find (by using more precise values than those shown above) ǻ S net = 4.39 J/K. 20. (a) We denote the mass of the ice (which turns to water and warms to T f ) as m and the mass of original-water (which cools from 80º down to T f ) as m . From Σ Q = 0 we have L F m + cm ( T f – 0º) + cm ( T f
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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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