Substance A has the following properties. mp at 1 atm:
Chapter 12, Problem 12.137(choose chapter or problem)
Substance A has the following properties. mp at 1 atm: ?20.C bp at 1 atm: 85C Hfus: 180. J/g Hvap: 500. J/g csolid: 1.0 J/g?C cliquid: 2.5 J/g?C cgas: 0.5 J/g?C At 1 atm, a 25-g sample of A is heated from ?40.C to 100.C at a constant rate of 450. J/min. (a) How many minutes does it take to heat the sample to its melting point? (b) How many minutes does it take to melt the sample? (c) Perform any other necessary calculations, and draw a curve of temperature vs. time for the entire heating process. 12.138
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