2.4 kg of water at 33 ° C is mixed with 6.5 kg of water at 54 ° C without exchanging heat with the environment. What is the change in entropy of this system? (For data see tables in the ppt about calorimetry). Select the correct answer from the following list:

a) 2.32 kJ/K

b) .173e4 J/K

c) 1.68 kJ/K

d) 16.0 J/K

 

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Table 17.1 Heats of Transformation (at Atmospheric Pressure) Substance Melting Point (K) 4 (kJ/kg) Boiling Point (K) 4, (kJ/kg) Alcohol, ethyl 159 109 351 879 Copper 1357 205 2840 4726 Lead 601 24.7 2013 858 234 630 296 Mercury Oxygen 11.3 54.8 13.8 90.2 213 Sulfur 388 53.6 718 306 Water 273 334 373 2257 Uranium dioxide 3120 259 3815 1533 © 2012 Pearson Education, Inc. Table 17.1 Heats of Transformation (at Atmospheric Pressure) Substance Melting Point (K) 4 (kJ/kg) Boiling Point (K) 4, (kJ/kg) Alcohol, ethyl 159 109 351 879 Copper 1357 205 2840 4726 Lead 601 24.7 2013 858 234 630 296 Mercury Oxygen 11.3 54.8 13.8 90.2 213 Sulfur 388 53.6 718 306 Water 273 334 373 2257 Uranium dioxide 3120 259 3815 1533 © 2012 Pearson Education, Inc.