Although we often assume that the heat capacity of a

Chapter 10, Problem 10.154

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Although we often assume that the heat capacity of a substance is not temperature-dependent, this is not strictly true, as shown by the following data for ice: Temperature (8C) Cp (J K21 mol21) 2200. 12 2180. 15 2160. 17 2140. 19 2100. 24 260. 29 230. 33 210. 36 0 37 Use these data to calculate graphically the change in entropy for heating ice from 2200.8C to 08C. (Hint: Recall that DST1ST2 5 3 T2 T1 Cp dT T and that integration from T1 to T2 sums the area under the curve of a plot of Cp/T versus T from T1 to T2.)

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