Sketch the cooling curve of a substance with the following points: (A) 85 OC and 0 min, (B) 60 OC and 2 min, (C) 60 OC and 5 min, (D) 20 OC and 8 min, and (E) 20 OC and 11 min. Label each line 1, 2, 3, and 4 and each point A, B, C, D, and E.   At which numbered section/s is/are kinetic energy of the molecules the greatest?

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