Experiment 7The Entropy of Mixing

• Materials and equipment:

  • DVM, = ± 0.1 mV
  • temp ± 0.1?C. ?E/?T ? ?E/?T =(170-150)mV mV/(20.0-10.0) ?C = 2 mV ?C-1
  • make 0.100m solutions using 0.975 kg water
    • 0.975 kg x 0.100m = 0.0975 mol solute; weigh on analytical balance, add to volumetric, tare, add 975 g water, mix and store in dark cabinet. Use dry funnel to add solute and wash down. dV/dn for solutes is less than solid volume so solution contracts.

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