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Past Exam for CHEM 3410 - PHYSICAL CHEMISTRY I with Richard at The Richard Stockton College of New Jersey (StoCo)

Exam Information

Material Type:Exam
Professor:Richard
Class:CHEM 3410 - PHYSICAL CHEMISTRY I
Subject:Chemistry
University:The Richard Stockton College of New Jersey
Term:Fall 2008
Keywords:
  • Natural Sciences
  • Temperature
  • Crystalline
  • Triple Point
  • Melting Point
  • Mathematics
  • Vapor Pressure
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The Richard Stockton College of New Jersey Chemistry Program, School of Natural Sciences and Mathematics PO Box 195, Pomoma, NJ CHEM 3410: Physical Chemistry I | Fall 2008 In-class practice problems October 22, 2008 1. Antimony trioxide Sb2O3, has two structurally di erent crystalline forms: cubic and orthorhombic (ortho). Over a range of temperatures, the value of for the change in state Sb2O3(ortho;p = 1 bar;T)!Sb2O3(cubic;p = 1 bar;T) is given by (in units of J, T in Kelvin, and with Cp negligibly small): (T;p = 1bar) = 5;815:+ 6:90T (a) Which form of Sb2O3 is thermodynamically stable at 298 K and 1 bar? (b) At what temperature are the two forms in equilibrium at p=1 bar? (c) The molar volumes of the cubic and orthorhombic forms are found to be Vcubic = 5:606 10 5 m3 and Vortho = 5:141 10 5 m3. Using the Clapeyron equation, calculate the slope of the cubic-orthorhombic coexistence line (dPdT ) in units of bar/K. HINT: 1 J/m3 = 10 5 bar and S = @ @T P . 2. You synthesize...

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